Chikungunya Spreads in the Indian Ocean: mayotte Sees Rise in Infections

The French island of Mayotte is grappling with a growing number of chikungunya cases, mirroring a larger epidemic unfolding in neighboring Reunion. Health officials have confirmed over a hundred infections in recent months, raising concerns about the virus’s spread and the effectiveness of preventative measures. As of early May, Public Health france reported 116 confirmed cases of chikungunya in Mayotte as late March. The agency noted a sharp increase in infections towards the end of April, possibly linked to school holidays, but indicated that the trend appears to be stabilizing.

Reunion Island Battles Major Epidemic, Vaccine Rollout Faces Setbacks

reunion Island, located approximately 1,500 kilometers from Mayotte, is currently experiencing a meaningful chikungunya epidemic. The outbreak has resulted in tens of thousands of cases and, tragically, twelve deaths. In response to the crisis, authorities initiated a vaccination campaign using the Ixchiq vaccine, developed by Valneva, a Franco-Austrian laboratory.However,the program encountered a setback when French health authorities suspended vaccinations for individuals over 65 on April 26,following reports of severe adverse reactions,including one fatality,in Reunion.

EMA Suspends vaccine for Elderly Amid Safety Concerns

The European Medicines Agency (EMA) followed suit, announcing on May 7 its decision to suspend the use of the chikungunya vaccine for individuals over 65. This decision was made to allow for a thorough reassessment of the vaccine’s benefit-risk profile based on available data. According to the EMA, 17 serious cases were reported in people aged 62 to 89, two of which have led to death in Reunion. One case involved an 84-year-old man who developed encephalitis, while the other concerned a 77-year-old man with Parkinson’s disease whose swallowing difficulties worsened, leading to aspiration pneumonia. the EMA has stated that vaccination with Ixchiq can continue for those under 65.

Mayotte’s Unique Health Challenges Demand Careful Vaccination Approach

Given the ongoing concerns surrounding the vaccine’s safety in older adults, Public Health France is urging caution regarding vaccination efforts in Mayotte, even for those under 65 who remain eligible. The agency emphasizes the need to consider the Mahorais health specificities when making vaccination decisions. Mayotte, recognized as the poorest department in France, faces significant public health challenges. The population frequently enough experiences poor health outcomes,with a high prevalence of comorbidities at advanced stages. As a result, the health agency advises prescribers to carefully weigh the potential benefits and risks of vaccination for each patient.

Prescribers must question the balance of benefits/risks in a strengthened manner with these patients.

Public Health France

Mayotte has already faced multiple public health crises in 2024, including a cholera outbreak and the aftermath of Cyclone Chido, further straining the island’s healthcare system.

Understanding Chikungunya: Symptoms and Transmission

Chikungunya, sometimes referred to as curved man’s disease due to the debilitating joint pain it can cause, is characterized by symptoms such as severe joint pain, headaches, and high fever. The virus is transmitted to humans through the bites of infected mosquitoes, primarily Aedes aegypti and Aedes albopictus. These mosquitoes are also responsible for transmitting other viral diseases like dengue fever and Zika virus. According to the World Health Organization (WHO), chikungunya outbreaks have been reported in Africa, Asia, Europe, and the Americas. As of 2023, the WHO estimates that millions of people are at risk of chikungunya infection globally.