Chikungunya Outbreak in Guangdong, China

Since July, Guangdong province in China has reported over 7,000 cases of chikungunya, a mosquito-borne virus, leading to measures that somehow mirror those taken during the Covid-19 pandemic.

In Foshan city, the area most affected, patients are required to stay in hospitals, where their beds are safeguarded with mosquito nets. They can only leave after a week or once they’ve tested negative.

The virus, transmitted through infected mosquito bites, often results in fever and considerable joint pain, which in some cases can persist for years. While it isn’t common in China, chikungunya outbreaks are frequently seen in South and Southeast Asia, as well as parts of Africa.

Extent of Infection in China

Beyond Foshan, at least 12 other cities in Guangdong have also reported cases. Just last week, nearly 3,000 new cases surfaced. Hong Kong has noted its first chikungunya case, involving a 12-year-old boy who developed symptoms after visiting Foshan in July.

Crucially, the virus is not contagious in the usual sense; it only spreads when a mosquito bites an infected person and then passes it on to someone else. So far, officials indicate that the cases reported have mostly been mild, with about 95% of patients discharged within a week.

Despite this, panic has emerged as the virus remains relatively unfamiliar in the country. Commenting on the situation, one user expressed concern on Weibo: “This is scary. The prolonged consequences sound very painful.”

The U.S. has recommended that travelers to China exercise increased caution due to the outbreak.

Measures Being Taken to Control Infections

Authorities in Guangdong are committed to employing “decisive and forceful measures” to curb the spread. Individuals experiencing symptoms such as fever or joint pain are urged to visit hospitals for tests.

Residents are being reminded to eliminate stagnant water around their homes, including in flowerpots and appliances, with threats of fines up to 10,000 yuan (about $1,400) for noncompliance. Additionally, officials are deploying “elephant mosquitoes,” which consume the smaller ones that carry chikungunya, alongside mosquito-eating fish into local lakes. Drones are even being used to identify stagnant water sources.

Some nearby cities had previously instituted a 14-day home quarantine for travelers from Foshan, a measure that has since been lifted. Comparisons to pandemic restrictions have sparked discussions. One user on Weibo remarked, “These feel so familiar… But are they really necessary?” while another questioned, “What’s the point of the quarantine? It’s not as though an infected patient will then go around biting other people?”

Understanding Chikungunya

People bitten by infected mosquitoes typically show symptoms within three to seven days. Besides fever and joint pain, other symptoms can include rash, headaches, and muscle pain. Most individuals recover within a week, but in severe cases, joint pain could linger for months or even years.

Those at greatest risk for severe illness include infants, the elderly, and those with pre-existing health issues like heart disease or diabetes. While there’s no specific cure for chikungunya, deaths from the virus remain rare. First identified in Tanzania in 1952, chikungunya has since spread to over 110 countries.

According to the World Health Organization, the best prevention method is reducing stagnant water that can serve as breeding grounds for mosquitoes.