Covid-19 fourth wave scare: Omicron sub-variant BF.7 driving surge in China, here are symptoms to watch out for

The surge in Covid-19 cases in Chinese cities is currently driven by highly transmissible Omicron strains, mainly BA.5.2 and BF.7. The BF.7 variant of Omicron, which is wreaking havoc in the capital city of Beijing, is stated to be the fastest spreading coronavirus. 

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