Health officials in California have confirmed that a South Lake Tahoe resident tested positive for the plague, the centuries-old disease that killed millions during the Black Death. The individual is believed to have contracted the infection after being bitten by an infected flea while camping near the Lake Tahoe Basin. According to El Dorado County Public Health, the patient is receiving care and recovering at home.

“Plague is naturally present in many parts of California, including higher-elevation areas of El Dorado County,” said Kyle Fliflet, the county’s acting public health director. “It’s important that individuals take precautions for themselves and their pets when outdoors, especially while walking, hiking and camping in areas where wild rodents are present.”

Though most people associate the plague with medieval Europe, the bacterium that causes it—Yersinia pestis—still circulates in parts of the United States. The Centers for Disease Control and Prevention (CDC) estimates an average of seven human cases occur each year nationwide.

Also Read: What History Teaches Us About Plague? Are There More Than One Type?

Most of these cases are sporadic, linked to fleas feeding on infected wild rodents such as ground squirrels and chipmunks. California, Arizona, New Mexico, and Colorado report the majority of cases. While the disease is now treatable with common antibiotics, untreated infections remain dangerous and potentially fatal.

In El Dorado County, plague activity is not unusual. State monitoring programs have detected Y. pestis exposure in at least 45 wild squirrels and chipmunks in the Lake Tahoe Basin since 2021. Most recent human case of plague in the region occurred in 2020 and was due to flea exposure.

How The Plague Spreads?

Most common way of transmission is by being bitten by an infected flea, but people can also get infected through handling infected animals or less commonly from pets like cats and dogs that are infested with fleas. There are three main forms of plague.

Bubonic plague – Most frequent, resulting from flea bites. The signs and symptoms are painful, swollen lymph nodes (buboes), fever, chills, headache, and weakness.

Septicemic plague – What happens when bacteria multiply in the blood, leading to bleeding beneath the skin, pain in the abdomen, and shock.

Pneumonic plague – Rarest but deadliest variety. It occurs when infection reaches the lungs and can be spread person to person through respiratory droplets.

More than 80% of U.S. cases are bubonic. If diagnosed early, antibiotics such as streptomycin, doxycycline, or ciprofloxacin can cure the disease. Without treatment, however, mortality remains high.

The term "plague" usually brings to mind the Black Death that caused an estimated 25 million deaths in Europe in the 14th century. That epidemic spread quickly from rat and flea populations in densely populated cities.

In the United States, the most recent rat-to-human plague outbreak took place in Los Angeles in 1924–1925. Since then, cases have been mostly confined to rural settings where people come in contact with wild rodents.

Only last month, an Arizona patient succumbed to pneumonic plague, highlighting that though unusual, the illness remains dangerous, especially when diagnosis is late.

How Did Lake Tahoe Become A Hotspot for Plague

Lake Tahoe’s mix of wilderness, high elevation, and rodent populations makes it one of California’s plague monitoring hubs. The California Department of Public Health (CDPH) routinely tests rodent populations, especially ground squirrels and chipmunks, for signs of Y. pestis exposure.

Officials stress that the presence of plague in wildlife does not mean widespread human danger. Instead, it highlights the importance of preventive measures for campers, hikers, and residents. Recommended precautions include:

• Using insect repellent containing DEET when outdoors
• Wearing long pants tucked into boots to minimize flea exposure
• Avoiding contact with wild rodents, dead animals, or their burrows
• Never feeding squirrels or chipmunks
• Keeping pets leashed or at home, and treating them with flea prevention

The South Lake Tahoe patient’s infection is believed to stem from a flea bite during a recent camping trip. Local health officials are investigating the case and have issued public advisories to remind residents and visitors about safety practices.

While the patient’s identity has not been disclosed, officials confirmed that they are receiving proper medical care and are expected to recover. The case has sparked renewed efforts to remind the public that while plague is rare, awareness is essential.

Is Plague Still A Cause Of Concern?

Globally, plague continues to cause outbreaks, particularly in parts of Africa, Asia, and South America. The World Health Organization reports several hundred cases per year, with Madagascar being one of the most affected countries.

In the United States, where public health infrastructure and antibiotics are readily available, cases are usually isolated and treatable. Still, experts say that ignoring plague entirely would be a mistake. Rodent populations are reservoirs for the bacterium, and climate change, increased outdoor recreation, and human encroachment into wildlife habitats may increase opportunities for transmission.

The South Lake Tahoe case is a reminder that ancient diseases are not fully relegated to history books. But unlike the Middle Ages, modern medicine provides effective tools to treat and contain outbreaks.

For residents and visitors, the takeaway is practical rather than alarmist: enjoy the outdoors but take precautions. For health authorities, it is a call to continue surveillance, public education, and rapid response when rare cases occur.

As Kyle Fliflet put it, “Plague is naturally present in many parts of California…It’s important that individuals take precautions for themselves and their pets when outdoors.”

When a child is born, parents must decide whether to vaccinate them against a range of preventable illnesses. While immunisations are not mandatory, health authorities strongly recommend them to protect both individual children and the wider community. Some professions, particularly in healthcare, require certain vaccinations as a condition of work.

UK Childhood Vaccination Rates Are Falling

Since 2022, no childhood vaccine in the UK has reached the World Health Organization’s recommended 95 per cent uptake, which is crucial for safeguarding vulnerable populations. As a result, preventable diseases like measles are making a comeback.

What’s Driving The Decline In Vaccination

Several factors contribute to falling vaccination rates. Parents may worry about safety, distrust healthcare systems, or follow religious or philosophical beliefs, such as preferring “natural immunity.” Access issues, like difficulties booking GP appointments, have also played a role, according to a BBC report. A malfunctioning NHS IT system has left thousands of children without appointment letters for essential vaccines.

NHS Doctor Issues Urgent Reminder

As per Mirror, NHS GP Dr Bhasha Mukherjee has shared a crucial message for parents. “Every parent wants to keep their child safe,” she wrote. “But here’s what the data reveals about the real risks today.” Dr Mukherjee highlighted that fewer children receiving full immunisation is directly linked to a surge in vaccine-preventable diseases. “This isn’t theoretical – it’s happening right now,” she added.

Measles Cases On The Rise

In 2024, confirmed measles cases in the UK jumped to nearly 3,000, compared with just 367 in 2023, marking the highest annual figure since 2012. Most cases were children aged one to four and five to ten, with 710 and 730 cases respectively, according to the UK Health Security Agency. Global data also shows over 10 million measles cases in 2023, a 20 per cent increase from 2022, linked directly to drops in routine vaccination coverage.

Whooping Cough and Other Illnesses Are Also Resurfacing

Pertussis, commonly known as whooping cough, is rising too. In England alone, more than 14,000 lab-confirmed cases were recorded in 2024, including hundreds among infants under three months old – the age group most vulnerable to severe illness. Sadly, several deaths were reported. Other diseases, like polio, are also reappearing in regions where children are missing essential jabs.

Why Vaccines Are Still Crucial

Many parents fear side effects, but Dr Mukherjee emphasised the dangers of avoiding vaccination. “Diseases like measles can lead to pneumonia, brain inflammation, hearing loss, long-term disability, or even death,” she said. “Vaccines aren’t perfect, but high coverage protects the whole community, especially infants and children with weakened immune systems.”

MMR (measles, mumps, rubella) vaccination rates in 2023–24 were 88.9 per cent, far short of the 95 per cent needed to prevent outbreaks. Dr Mukherjee warns that this shortfall is driving a resurgence in these serious illnesses.

Choosing not to vaccinate increases your child’s risk of catching real, rising threats – and contributes to outbreaks that put many other children at risk too,” Dr Mukherjee concluded.

The human heart can grow new cells in damaged areas after suffering from a heart attack, an Australian study shows.

Heart attacks occur when blood flow to the heart is severely reduced or blocked due to a buildup of plaque which is made of fat, cholesterol and other substances in the heart's arteries.

During a heart attack, a lack of blood flow causes the cells and tissue in the heart muscle to die, leading to irreversible damage that can result in serious complications like arrhythmias, heart failure, cardiogenic shock, or cardiac arrest

It is one of the leading causes of death in the country. Four Indians experience a heart attack every minute, with one in four dying of the cause. Experts have also noticed a rising trend of nearly 50 percent of heart attack patients being under the age of 40, with half of all heart attacks in Indian men occurring under 50.

However scientists in Australia have found that organ can regrow new cells to replace the damaged ones after an attack through increased mitosis.

How Does The Heart Regrow Cells?

Until now, the phenomenon of new heart cells growing in scarred areas of the heart had only been seen in mice however, the team made a breakthrough using living heart tissue samples collected from human patients undergoing bypass surgery at Australia’s Royal Prince Alfred Hospital.

The study, published in Circulation Research, found that while sections of the heart remain that had been left scarred following a heart attack, new heart muscle cells were also being produced in the same area through mitosis.

This process involves a parent cell dividing itself to create two genetically identical daughter cells, each with the same number of chromosomes as the parent for growth, repair and replacing old cells in humans.

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Robert Hume, a research fellow at the University of Sydney and the study’s first author, said: "Until now we’ve thought that, because heart cells die after a heart attack, those areas of the heart were irreparably damaged, leaving the heart less able to pump blood to the body’s organs.

"In time, we hope to develop therapies that can amplify the heart’s natural ability to produce new cells and regenerate the heart after an attack."

The scientists are yet to discover the exact mechanism between how cells regrow in scarred regions of the heart.

Coronary Artery Disease: The Silent Killer

Coronary artery disease (CAD) is one of the most common illnesses that can cause a heart attack in people. It develops over years and has no clear signs and symptoms apart from a heart attack.

The illness begins due to a buildup of fats, cholesterol and other substances known as plaque in and on the artery walls.

Over time, this can cause narrowing or blockage of the coronary arteries and block the supply of oxygen-rich blood to heart which can lead chest pain (angina), shortness of breath and ultimately, heart attacks.

Typically, those above the age of 45, having a biological family member with heart disease, lack of sleep, smoking, consuming saturated fats along with other autoimmune diseases such as lupus and rheumatoid arthritis can increase the risk of developing CAD.

Nearly one in 10 Indian adults suffer from CAD and about two million people die from the disease annually. Apart from this, about 18 to 20 million American adults aged 20 and older are also affected about the disease.

Ongoing measles outbreaks across several parts of the country are raising questions about whether the United States could lose its long-held status of having eliminated the virus, yet a senior CDC official said on Tuesday that such a shift would not be a major cause for alarm.

According to CNN, the briefing marked federal officials’ first public comments on a continuing outbreak in South Carolina that has reached at least 646 cases, based on data from the state health department. Last year, a separate outbreak in West Texas recorded around 760 cases, making it one of the largest and deadliest measles outbreaks the U.S. has faced in decades.

At the briefing, U.S. Centers for Disease Control and Prevention Principal Deputy Director Dr. Ralph Abraham, a former Louisiana surgeon general who previously scaled back some vaccine promotion efforts in his state, said there is no clear evidence proving that transmission is occurring between states involved in the outbreaks. He also stated that even if the U.S. were to lose its elimination status, it would not be a serious concern.

Measles Elimination Status ‘Not Really’ A Concern, CDC Official Says

“Losing elimination status does not mean measles would suddenly become widespread, nor would it change the core strategies used to control it,” Abraham said. He emphasized that vaccination remains the most effective protection against measles, while also reiterating his support for personal choice.

CDC data shows the U.S. recorded 2,242 measles cases in 2025, the highest number reported since 1991. The disease was officially declared eliminated in the country in 2000. The Pan American Health Organization (PAHO) is expected to review that designation when it meets in April. When asked whether losing the status would be a significant setback, Abraham responded, “not really,” adding that the CDC’s focus is on supporting affected communities and reducing the impact of outbreaks.

What Is Measles?

Measles, also known as rubeola, is an extremely contagious viral illness that typically causes high fever, cough, runny nose, red and watery eyes, and a characteristic rash that begins on the face and spreads downward across the body. It spreads through respiratory droplets and can lead to severe and sometimes fatal complications, including pneumonia and inflammation of the brain known as encephalitis.

Although it is preventable through the safe and effective MMR vaccine, measles remains a serious threat in many regions. There is no specific cure, and treatment focuses on managing symptoms, according to the Cleveland Clinic.

Measles Cases Still Rising In The US

About a year ago, health officials identified measles cases in a small town in western Texas. The virus soon moved into nearby counties, and other states, including Utah and South Carolina, began reporting outbreaks of their own. By the end of 2025, more than 2,200 measles cases had been confirmed nationwide, marking the highest annual total in the U.S. in 33 years, based on CDC figures.

The country also recorded its first measles-related deaths in more than a decade. Two unvaccinated school-aged children in Texas died, along with an unvaccinated adult in New Mexico. It remains unclear whether the cases confirmed in Texas on January 20 are connected to outbreaks elsewhere. If they are, it would indicate that the U.S. has experienced a full year of uninterrupted measles transmission.

If officials determine that measles has been spreading continuously for 12 months, the U.S. could lose the elimination status it achieved in 2000. In that case, measles would once again be classified as endemic, meaning it is consistently circulating within the country.

Will US Lose Its Measles Elimination Status Soon?

Last year, the CDC confirmed 2,144 measles cases across 44 states, along with nearly 50 distinct outbreaks, the highest numbers seen since 1991. Experts say the situation has been building for years, driven by declining routine childhood vaccination rates, parental exemptions, limited access to health care, and widespread misinformation. More recently, health officials under the Trump administration questioned long-established vaccine safety and cut funding for local programs aimed at boosting vaccination coverage.

State health department data shows that the first known case in the Texas outbreak developed the classic measles rash on January 20, 2025. From there, the outbreak rapidly escalated. Officially, 762 people became ill, most of them in rural Gaines County, and two children died. Health officials believe the true number is higher. In March 2025 alone, 182 possible measles cases among children in Gaines County were never confirmed, suggesting the outbreak may have been undercounted by as much as 44 percent in that area.

Gaps like these are common and make it harder to accurately track outbreaks. Many people in affected communities face barriers to health care and have deep mistrust of government institutions.

Genetic sequencing has helped clarify some of the missing links. Ultimately, the decision may hinge on how PAHO experts interpret incomplete data, said Dr. Andrew Pavia, a Utah-based physician and longtime CDC adviser, as per CNN.

“My best guess is that we will lose elimination status,” Pavia said. “The argument that this hasn’t been continuous transmission is weak, and I think they will likely err on the side of declaring a loss.”

PAHO will also review Mexico’s measles-free status at the same time, Oliel said. Mexico’s largest outbreak has been linked to Texas. It began when an 8-year-old boy from Chihuahua became ill after visiting family in Seminole, Texas. Since February last year, Mexico has reported about 6,000 measles cases, with 21 deaths in Chihuahua state alone.

Under PAHO’s current definition of elimination, international borders play a key role. For example, if a chain of transmission started in the U.S., spread to Mexico, and then re-entered the U.S., it would be considered a new chain. Many experts argue that this standard no longer reflects modern patterns of disease spread.

What is clear, however, is that measles found widespread opportunity to spread in the U.S. in 2025. The virus moved through schools, day-care centers, churches, hospital waiting rooms, and even a detention center. New Mexico reported 100 cases and one adult death. Kansas spent seven months trying to contain an outbreak that sickened nearly 90 people across 10 counties. Ohio confirmed 40 cases, while Montana, North Dakota, and Wisconsin each reported 36.