Mauritius Battles Mosquito Virus Outbreak with 102 Active Cases Reported

The US Centres for Disease Control and Prevention (CDC) has issued a Level 2 travel advisory for Mauritius, urging visitors to “practice enhanced precautions” amid a surging outbreak of the mosquito-borne chikungunya virus.

The alert impacts a destination highly popular with international holidaymakers, including 15,000 Americans and approximately 1.3 million annual visitors.

The health agency has stated that the virus is vaccine-preventable, advising all international travellers to secure their shots before departure.

The vaccine is noted to be roughly 98 per cent effective, maintaining immunity for approximately three years. Travellers are also urged to wear insect repellent and long clothing to minimise bite risks.

Rising Infections in Mauritius

Mauritius, an Indian Ocean island nation renowned for its white-sand beaches, recorded its first case in January 2026.

Data from the Government Information Service Mauritius reveals that between January and 11 May 2026, the country logged 2,816 local cases, which included 102 active cases as of 12 May.

Local media outlet L’Express reported that authorities are observing a “gradual increase in infections, which requires particular attention from public health services.”

Official reports indicate that the outbreak is concentrated in specific regions, including Rose-Hill, Plaisance, Stanley, Camp-Levieux, Mont-Roche, and Roche-Brunes.

Global Scale and COVID-Style Interventions

The outbreak comes amidst a wider international spike. According to the European Centre for Disease Prevention and Control (ECDC), 2026 has seen Colombia, Cuba, Guatemala, Guyana, Mauritius, Peru, and Saint Lucia report chikungunya cases for the first time.

ECDC data up to 28 February 2026 indicates 32,758 cases and nine associated deaths across at least 18 countries this year. This follows a heavy global toll last year, which saw more than 459,000 cases and 146 deaths worldwide.

The current situation follows an intense outbreak in China last year, which prompted aggressive, technology-driven vector control measures reminiscent of the COVID-19 era.

Beginning in Foshan on 8 July 2025, China’s outbreak surpassed 3,000 confirmed cases within a fortnight and exceeded 10,000 less than two months later.

In response, Guangdong Province implemented strict surveillance, mandatory patient isolation, door-to-door inspections, the elimination of stagnant water, and the release of larvae-eating fish.

Similar insecticidal spraying operations were carried out in public housing estates in Hong Kong following imported cases last summer.

Symptoms and Medical Risks

Chikungunya is transmitted to humans through the bites of infected Aedes aegypti and Aedes albopictus mosquitoes.

Symptoms typically manifest three to seven days after a bite, initially presenting as a severe flu accompanied by a high fever and excruciating joint pain in the hands, feet, and knees. This is quickly followed by a rash, headaches, and severe muscle aches.

While most patients recover within a week or two, the joint pain can persist, causing ongoing stiffness, swelling, and arthritis-like symptoms that can endure for months or even years.

There is no specific treatment for the virus. While the general death rate is low—at around one in 1,000 symptomatic cases—the risk of mortality rises drastically up to 15 per cent among individuals with pre-existing conditions, such as diabetes, kidney disease, and heart disease.

Fatalities are frequently caused by secondary complications, including kidney and brain failure, rather than the virus itself.

US Domestic Impact

The virus has already reached the United States. In August 2025, a 60-year-old woman from Hempstead, Long Island, was diagnosed with a suspected case.

Because she had not travelled off the island, laboratory tests confirmed it as the first-ever locally acquired case recorded in New York State.

According to New York’s Department of Health, three additional individuals in New York tested positive in 2025 after returning from areas where the virus circulates.

Overall, the CDC reported one locally acquired case and 466 travel-associated cases across the US last year.

Source: MSN