China is now the epicentre of Covid. The world should be watching – and testing | Devi Sridhar

With China's government underplaying its domestic outbreak, it's vital that other countries remain alert to new variants

After almost three years of trying to wholly eliminate the virus that causes Covid-19 from within its borders, the Chinese government has abruptly changed course. Now, the country is attempting to live with Covid-19". Testing is no longer required, and numbers of officially reported Covid-19 cases are at odds with scientific estimates of the situation.

While official estimates suggest there are 4,000 cases of Covid a day, scientists estimate the number is more like 1 million. Official death tolls are similarly unreliable. The lack of transparency from the Chinese government, and the lack of trust in what it's saying about its domestic outbreak, has prompted concern across the world.