Health authorities in Australia have sounded the alarm after a traveller returning from Bali tested positive for measles, sparking concerns in communities south of Brisbane and reinforcing the urgent need for vaccination. The highly contagious viral illness, once considered largely under control in many developed countries, is making a troubling comeback in Australia with cases rising sharply in Queensland and Western Australia.The alert follows an infected passenger’s arrival on Jetstar flight JQ60 into Brisbane on August 19, and subsequent visits to multiple public venues in Yamanto and Boonah while unknowingly infectious. While those locations are no longer considered a risk, people who were present during the identified times are being urged to monitor for symptoms for up to 18 days.The infected individual landed at Brisbane Airport at 5:40 a.m. on August 19 before moving through the terminal until around 7:10 a.m. Later that day, they visited an Aldi supermarket in Yamanto, and in the following days, they attended a pharmacy and the Boonah Hospital emergency department.Dr. Catherine Quagliotto, Public Health Physician at West Moreton Health, explained that while the virus does not remain in the environment long after an infected person has left, the exposure risk during the infectious window was significant. “Early signs can include fever, cough, runny nose and red or watery eyes, followed a few days later by a distinctive red, blotchy rash,” she said. Symptoms typically develop 7–10 days after exposure but can take as long as 18 days to appear.Queensland Health has urged anyone who develops symptoms to stay home, seek testing, and contact their doctor or hospital ahead of arrival to avoid spreading the virus further.Western Australia Also on Measles High AlertThe Brisbane case comes as Western Australia reports a worrying spike in measles. WA Health confirmed 13 cases in July and August 2025, including four linked to overseas travel and nine acquired locally. This represents a dramatic rise compared to just six cases across the entire state in 2024.Dr. Paul Armstrong, Director of the Communicable Diseases Control Directorate, emphasized that vaccination remains the cornerstone of protection. “Measles is highly infectious and can cause serious illness, particularly in babies and young children, and often requires hospitalisation and, in rare cases, blindness or even death,” he said.The outbreak is closely tied to international travel. Popular holiday destinations such as Indonesia, India, Vietnam, and other parts of South and Southeast Asia continue to report high numbers of measles cases, making travellers a key factor in reintroducing the virus to Australia.Why Measles Is So Concerning?Measles is far more than just a childhood illness. Caused by a virus that spreads through airborne droplets from coughing and sneezing, it is one of the most contagious diseases known. A single infected person can pass it on to up to 90% of unvaccinated people in close contact.While most individuals recover within a week of developing the characteristic rash, measles can lead to severe complications. These include pneumonia, encephalitis (brain inflammation), hearing loss, and in rare but devastating cases, death. Pregnant women, infants, and people with weakened immune systems are especially vulnerable.How Recognize Symptoms of Measles?Measles progresses in stages. The first signs usually resemble a common cold: fever, cough, runny nose, and red, watery eyes. Within a few days, small white spots may appear inside the mouth, followed by the hallmark red, blotchy rash that typically spreads from the face downward across the body.Crucially, people are contagious even before the rash develops—about five to six days before symptoms appear and up to four days after. This makes containing outbreaks extremely challenging, particularly in busy international hubs like airports.Vaccination Is The Best Defense And PreventionAustralia maintains one of the world’s strongest vaccination programs, with more than 93% of children over age five fully immunised against measles. The standard schedule includes two doses of the measles-mumps-rubella (MMR) vaccine, given at 12 months and 18 months of age.However, gaps remain. Adults born after 1965 who missed doses, migrants from countries with weaker immunisation programs, and people who are immunocompromised represent at-risk groups. The Australian government continues to offer free catch-up vaccines for adults under 20 and for people arriving for humanitarian reasons.“Adults aged between 30 to 60 years should get vaccinated if they do not have evidence of two doses of a measles vaccine,” Dr. Armstrong advised. He also noted that infants as young as six months can receive the vaccine early if traveling to high-risk areas.Importantly, there is no booster requirement for those who have already had two doses, and people who have previously contracted measles are considered immune for life.The resurgence of measles in Australia mirrors trends worldwide. After years of steady progress toward elimination, the World Health Organization has reported rising cases across Asia, Africa, and parts of Europe. Pandemic-related disruptions to immunisation programs have left millions of children unprotected, fueling outbreaks in countries that had previously made strides against the disease.Travel plays a key role in this resurgence. With international tourism rebounding strongly after COVID-19, Australians returning from popular destinations like Bali are now at increased risk of both contracting and importing measles.Authorities in Queensland and WA are working swiftly to contain the spread. Public alerts about exposure sites, targeted communication campaigns, and free vaccine programs are all part of a coordinated response. Health professionals emphasize that personal responsibility—staying home when sick, seeking timely medical advice, and checking vaccination status—is equally critical.Dr. Quagliotto put it simply: “Vaccination offers the best protection for both individuals and the community.”What Should Travelers Be Cautious About?If you’re planning travel to measles affected regions or even in general, consult your doctor about vaccination well in advance. Parents with young children should be aware that infants may need an accelerated vaccination schedule.On return, any flu-like symptoms coupled with rash development should prompt immediate medical attention. Always call ahead before visiting a healthcare facility, and wear a mask to prevent spreading the virus.The measles alert south of Brisbane is a reminder that even in countries with high vaccination rates, the virus can re-emerge through international travel. With Australia now reporting more cases in 2025 than in recent years combined, vigilance is essential.