As a microbiologist at the Icahn School of Medicine at Mount Sinai and a member of the Global Virus Network’s chikungunya task force, I want to share some important information about the chikungunya virus. The virus was first identified in Africa in 1952, and it is mainly spread by two types of mosquitoes: Aedes aegypti and Aedes albopictus.
People typically develop symptoms three to seven days after being bitten. In 2025 alone, about 240,000 cases and 90 deaths have been reported across 16 countries and territories through July, with cases seen in the Americas, Africa, Asia, and Europe.
Infection usually causes deeply painful joints, fevers, nausea, fatigue, and a rash. Most people recover within a week or two. However, sometimes these problems can persist for months or even years, and the virus can also cause serious heart complications.
In rare cases, chikungunya can be fatal. The individuals most at risk are those who are immunocompromised, the elderly, and babies. It’s important to be aware and take preventive measures, especially in areas where the virus is present.
— Dr. Jean Lim