With a longer and more severe cold and flu season expected this year, many are questioning whether a single dose of the influenza vaccine will be enough to prevent severe illness and respiratory complications. The rise in conversations around extra vaccine doses and COVID-19 booster shots has led to further speculation—can you receive more than one flu shot in the same season? And would that offer enhanced protection?

The short answer is that one flu shot per year is generally sufficient for most individuals. However, there are some exceptions, particularly for young children receiving the vaccine for the first time. Additionally, because flu season lasts from October through May and multiple strains circulate, it is possible to contract the flu twice within the same season. Understanding flu immunity, vaccine effectiveness, and prevention measures is key to navigating this complex issue.

Flu viruses exist in multiple strains, primarily categorized into influenza A, B, C, and D. The ones responsible for seasonal epidemics are influenza A and B, with various subtypes and mutations occurring each year. When a person gets infected with one strain, their immune system develops antibodies to fight off that particular strain. However, these antibodies do not necessarily provide protection against a different strain, which is why individuals may experience the flu more than once in a season.

How Effective Is a Single Flu Shot?

Each year, the U.S. collaborates with the World Health Organization (WHO) to develop flu vaccines that target the most prevalent strains expected to circulate. The annual flu shot typically includes protection against two influenza A strains (H1N1 and H3N2) and two influenza B strains (Yamagata and Victoria lineages). Despite these efforts, flu vaccine effectiveness varies due to factors such as:

• The accuracy of strain prediction for the season
• The age and health condition of the recipient
• The ability of the vaccine to provide cross-protection against unexpected virus mutations

In years when the vaccine closely matches the circulating strains, it can significantly reduce the risk of severe illness, hospitalizations, and complications. However, mismatches can occur, leading to lower effectiveness rates.

Are Two Flu Shots Necessary for Adults?

While young children receiving their first flu shot require two doses for optimal protection, there is no evidence that a second flu shot benefits healthy adults. Research on immunocompromised individuals, such as organ transplant recipients, has explored the possibility of additional doses, but the Centers for Disease Control and Prevention (CDC) maintains that there is no proven benefit in administering multiple flu shots to the general population.

The CDC explicitly states, “Studies have not shown a benefit from getting more than one dose of vaccine during the same influenza season, even among elderly persons with weakened immune systems.” For now, the standard recommendation remains one flu shot per season.

Can You Get the Same Flu Strain Twice?

If you've had the flu once in a season, the likelihood of contracting the exact same strain again is low. Once your immune system fights off a specific strain, it retains memory of that virus and can respond more effectively to future exposures. However, because multiple strains circulate during flu season, it is possible to become ill with a different strain even after recovering from an initial infection.

Why Do Some People Still Get the Flu After Vaccination?

While flu vaccines are designed to protect against the most common and severe strains, they are not foolproof. A vaccine’s effectiveness depends on how well it matches the circulating strains, how quickly the virus mutates, and individual immune responses. In some cases, vaccinated individuals may still contract the flu but experience milder symptoms compared to those who are unvaccinated.

For example, the 2018 flu vaccine was found to be only 36% effective against the dominant H3N2 strain that year. However, it still provided significant protection against hospitalization and severe complications, highlighting the importance of vaccination even when effectiveness rates vary.

How Long Does Flu Immunity Last?

Flu vaccine-induced immunity typically lasts for about six months. This is why the CDC recommends getting vaccinated in September or October, ensuring protection during the peak flu months of December through February. While early vaccination (such as in July or August) is not harmful, its effectiveness may wane before the flu season concludes.

Additionally, those who have already had the flu in a given season can still benefit from vaccination, as it provides protection against other circulating strains.

How to Prevent the Flu and Reinfection?

Beyond vaccination, there are several measures to reduce flu risk and prevent reinfection:

• Wash hands frequently with soap and water, especially after touching public surfaces.
• Minimize exposure to infected individuals whenever possible.
• Use a tissue or your elbow to prevent the spread of germs.
• Maintain a healthy diet, exercise regularly, and get adequate sleep.

For high-risk individuals—including infants, the elderly, pregnant women, and those with chronic health conditions—taking extra precautions and seeking medical advice at the first signs of illness is essential.

When to Contact a Healthcare Provider

If flu symptoms persist beyond a week or worsen significantly, it is important to seek medical attention. High-risk individuals should be especially vigilant, as complications like pneumonia can arise. Contact a healthcare provider if experiencing severe symptoms such as:

• Difficulty breathing or chest pain
• Persistent high fever
• Severe dehydration
• Confusion or dizziness
• Choosing the Right Flu Vaccine

For those over 65, the CDC recommends high-dose flu vaccines that provide stronger immune responses, such as:

• Fluzone High-Dose Quadrivalent
• Flublok Quadrivalent Recombinant
• Fluad Quadrivalent Adjuvanted

These options offer enhanced protection for older adults who may not respond as robustly to standard flu vaccines.

While flu season can be unpredictable, an annual flu shot remains the best defense against infection and severe complications. Although getting a second flu shot in the same season is not recommended for most adults, staying vigilant with preventive measures can further reduce the risk of illness. If you have concerns about flu vaccination or your personal risk factors, consult a healthcare provider to make an informed decision about your flu prevention strategy.

In a controversial move that has rattled the U.S. medical community, federal health officials have severed ties with more than half a dozen major medical organizations from participating in government vaccine advisory workgroups.

The decision, communicated via email on Thursday, disinvites top experts from these groups from contributing to the workgroups that support the Advisory Committee on Immunization Practices (ACIP), a key body that guides the nation’s vaccination policies.

Organizations affected include the American Medical Association (AMA), the American Academy of Pediatrics (AAP), the Infectious Diseases Society of America (IDSA), and several others, many of whom have historically played a critical role in shaping vaccine guidelines.

“This is deeply concerning and distressing,” said Dr. William Schaffner, a renowned vaccine expert from Vanderbilt University who has been involved with ACIP workgroups for decades. “Removing these organizations will likely create conflicting messages about vaccine guidance. Patients might hear one thing from the government and another from their personal doctors.”

Longstanding Collaboration Ends Abruptly

For years, the ACIP has relied on a structured system where experts from various medical and scientific fields evaluate vaccine data and help draft recommendations. These recommendations, once approved by the Centers for Disease Control and Prevention (CDC), often inform clinical practice and determine insurance coverage.

But according to an email obtained by Bloomberg and confirmed by federal officials on Friday, the medical organizations are now being sidelined on the grounds that they are “special interest groups” and are assumed to carry a “bias” due to the populations they serve.

Dr. Schaffner defended the former system, highlighting how professional organizations offered practical insights on how recommendations could be realistically implemented in clinical settings. Importantly, all members were subject to conflict-of-interest vetting, ensuring objective guidance, he added.

Health Secretary Kennedy’s Sweeping Changes

This latest shake-up follows an earlier, unprecedented move in June when U.S. Health Secretary Robert F. Kennedy Jr. abruptly dismissed the entire ACIP panel, accusing it of being too closely aligned with vaccine manufacturers. Kennedy, a former leader in the anti-vaccine movement, has since appointed several known vaccine skeptics to the new committee.

Among the organizations removed from the workgroup process are the American Academy of Family Physicians, American College of Physicians, American Geriatrics Society, American Osteopathic Association, National Medical Association, and the National Foundation for Infectious Diseases.

In a joint statement released Friday, the AMA and several of the disinvited organizations denounced the decision, calling it “irresponsible” and “dangerous to our nation’s health.” The statement warned that excluding their medical expertise “will further undermine public and clinician trust in vaccines.”

The groups urged the administration to reverse the decision, emphasizing the importance of transparency and collaboration in public health decision-making.

Lawsuit and Fallout

Several of the ousted organizations had previously criticized Kennedy’s overhaul of the ACIP. Last month, three of them joined a lawsuit challenging the government’s decision to halt COVID-19 vaccine recommendations for most children and pregnant women, a policy shift that has been widely criticized by public health experts.

Meanwhile, newly appointed ACIP member Retsef Levi, a professor of business management with no formal medical background, defended the administration's direction on social media. Levi wrote that future workgroups would “engage experts from an even broader set of disciplines,” and claimed that membership would be based on “merit & expertise, not organizational affiliations with conflicts of interest.”

The Department of Health and Human Services (HHS) has not yet disclosed which experts will replace the disinvited members or when the new workgroups will begin operating.

The United States Centers for Disease Control and Prevention (CDC) is assessing a potential travel notice for China following a sharp rise in cases of chikungunya, a mosquito-borne viral infection that has sparked public health alarms in southern China, as reported by the Independent and the South China Morning Post.

Nearly 5,200 infections have been reported in the Guangdong province since early July, with most of them concentrated in the city of Foshan. Health officials there have since escalated their emergency response to a level III alert, which signals a “relatively major” public health threat in China’s four-tier system.

While the CDC has not yet published a formal advisory, a spokesperson told The Independent that the agency is “aware of the reported chikungunya outbreak in Guangdong Province in China and is currently assessing the size and extent of the outbreak.”

What is chikungunya?

Chikungunya is a viral infection transmitted by the bite of an infected Aedes mosquito, the same mosquito species responsible for dengue and Zika. Symptoms typically include sudden onset of fever and joint pain, but may also include headache, muscle pain, swelling, and rash.

Although most cases are mild and self-limiting, some infections can lead to prolonged joint pain or, in rare cases, long-term complications. Serious outcomes are more likely among those with pre-existing health conditions. There are no antiviral treatments available, so prevention, particularly mosquito control and bite avoidance, remains the primary approach.

Vaccines against chikungunya have recently become available and are recommended for travelers to high-risk areas, although they are not yet widely accessible.

According to local health authorities in Foshan, around 95% of reported cases have been mild, with patients recovering within a week. However, the outbreak’s rapid spread has raised concern among international health bodies.

Global spread and WHO alert

The outbreak in China follows a global pattern of chikungunya resurgence. The World Health Organization (WHO) issued an alert last week warning of the risk of the virus repeating its global spread from two decades ago. Diana Rojas Alvarez, a medical officer with WHO, said that nearly 5.6 billion people across 119 countries live in areas where the virus could potentially spread.

Chikungunya was first identified in 1952 in Tanzania and has since been detected in more than 110 countries, including major outbreaks in India, Italy, and the Americas. The virus is not spread from person to person; instead, it is carried by mosquitoes that have fed on infected individuals and then pass it to others.

The concern is not just local: international travel plays a key role in how the virus crosses borders. Infected travelers returning to or visiting countries with mosquito populations capable of transmitting the virus can trigger new outbreaks.

China’s response: Mosquito control and surveillance

The first case in this outbreak was reported in Foshan’s Shunde district on July 8 and was believed to be imported. Since then, local and national health authorities have moved quickly to contain the spread.

Measures taken include the use of drones to detect rooftop water accumulation, the release of larva-eating fish into lakes, and widespread public awareness campaigns. Residents have been urged to eliminate standing water, install window screens, and wear protective clothing.

Hospitals in affected areas have increased bed capacity for confirmed cases and designated specialized treatment centres. Border controls have been stepped up in Hong Kong to prevent imported cases from mainland China, with expanded testing capabilities introduced at key entry points.

CDC travel warnings: What it means for travelers

The CDC’s travel health notices are used to inform travelers about global disease risks and provide precautionary guidelines. The warning system has four levels, ranging from “practice usual precautions” (Level 1) to “avoid all travel” (Level 4).

As of now, China has only a Level 1 travel health notice for measles. However, the CDC has issued Level 2 notices for chikungunya in several countries including Bolivia, Kenya, and Madagascar in recent months.

If the CDC decides to escalate China’s status, it would be a significant development, both in terms of travel planning and diplomatic perception.

US–China tension and public health

The potential issuance of a travel notice also comes against the backdrop of complex US–China relations. While the CDC’s move would be grounded in public health data, the optics of a travel warning could have broader implications.

On Thursday, Chinese foreign ministry spokesperson Guo Jiakun responded to the reports, saying that China is in communication with the WHO and “making every effort to ensure a safe environment for travelers.”

The WHO has not issued any travel restrictions related to the outbreak but continues to monitor the situation closely.

A word of caution for travelers

With mosquito-borne diseases on the rise globally, driven by climate change, urbanization, and increased mobility, health experts advise travelers to stay informed and take preventive measures.

“Mosquito control is key,” said an official from the Hong Kong Centre for Health Protection. “Simple actions like using insect repellent, sleeping under mosquito nets, and avoiding stagnant water can go a long way in preventing infection.”

As global health agencies monitor the chikungunya outbreak in China, travelers to affected areas should remain vigilant and stay updated with official advisories. Prevention remains the best protection in the face of a disease with no cure.

August is known as the Hair Loss Awareness Month and the first Saturday of this month is known as the International Alopecia Day.

Hair loss is a common concern, affecting over 85% of men, 55% of women, and between 15–38% of adolescents at some point in their lives. For those with advanced or long-lasting alopecia, the emotional and social impact can be profound.

Baldness has been linked to significant declines in mental health and quality of life, with higher rates of anxiety, depression, stress, and reduced self-esteem.

What Is Alopecia?

It is a term used for hair loss that affects the scalp or even the entire body, temporarily or permanently. Alopecia can happen due to variety of reasons, including heredity, hormonal changes, and medical conditions, or as simple as normal aging.

Aim of Alopecia Day

The day aims to form a community of those who experience this autoimmune disease.

Origin of International Alopecia Day

International Alopecia Day was initiated by American activist Lynn W. Walker in 2011. She herself lives with a diagnosis of alopecia totalis and created this day to unite people with similar experiences, reduce stigma, and highlight beauty and strength regardless of the presence of hair.

Theme of Alopecia Day 2025

This year's theme as per Alopecia UK is, 'Strength in Numbers', which urges more and more people to join the International Alopecia community and to do away with the shame of hair loss and form a support group, across the world.

Alopecia And Its Kinds

As per the National Library of Medicines, US, alopecia refers to the loss or absence of hair in areas where it normally grows. It can be localized or widespread, temporary or permanent, and affects people of all ages and genders. As a symptom with diverse underlying causes, alopecia is generally categorized into two main types: nonscarring (the most common) and scarring (cicatricial).

For many patients, hair loss leads to significant emotional distress and a reduced quality of life. Accurate diagnosis requires a thorough history, physical examination, and targeted investigations to identify the root cause and guide effective treatment. Managing alopecia can be challenging, but this overview outlines key assessment and treatment approaches for the most common forms to support better outcomes.

Forms of alopecia

There are several main types of alopecia, including:

alopecia areata: an autoimmune disease that causes hair loss, often in small, round patches on the scalp, but it can occur anywhere on the body

alopecia totalis: complete loss of scalp hair

alopecia universalis: hair loss over the entire body

androgenetic alopecia: hereditary baldness

Ways You Can Participate In International Alopecia Day

• Learn and share knowledge about alopecia
• Participate in activities for Alopecia Day
• Embrace the symbol by wearing blue
• Share you story to build a support group
• If you are a doctor, you can also advocate for the right alopecia treatment
• Contribute financially to alopecia research and awareness groups
• Volunteer to help spread alopecia awareness
• Raise voice against bullying, as many people are bullied due to their hair loss