Many say control measure for mosquito-borne disease hark back to the zero-Covid era, in which people’s daily lives were strictly monitored.

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A single mother living in Zhanjiang, a port city in Guangdong province, posted a video on social media this week showing a group of people, including a uniformed police officer, entering her children’s bedroom in the middle of the night and taking blood samples from the boy and the girl, without their mother’s presence or consent. The mother had been working a night shift so was not at home.

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Health authorities in Guangdong are on high alert because of an outbreak of Chikungunya that started about a month ago in Foshan, a city 260km from Zhanjiang. There have been about 8,000 reported cases so far, and at least one imported case in Hong Kong, a city that borders Guangdong.

Chikungunya is a mosquito-borne disease that can only be spread by being bitten by an insect with the virus. Symptoms include fever, muscle and joint pain, nausea and a rash. In rare cases, symptoms can last for months or even years. But it is rarely fatal. Babies, elderly people and people with underlying health conditions are most at risk.

There are regular Chikungunya outbreaks in Asia, Africa and the Americas, but this is the first time that there has been a major occurrence in China.

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