![A woman wearing a face mask walks along a street, following new cases of the coronavirus disease (COVID-19) in the country, in Beijing, China January 11, 2021. REUTERS/Tingshu Wang](https://thenational-the-national-prod.cdn.arcpublishing.com/resizer/v2/AQ2FY7NCNQRBG2GMJRDYWRLWBU.jpg?smart=true&auth=54bd3e2e1d0635b06675d73583111bb6406b445eb84d4ba147a6d3334fb169d7&width=400&height=225)
A woman wearing a face mask walks along a street in Beijing. Reuters
A woman wearing a face mask walks along a street in Beijing. Reuters
Scientists fear South African virus strain poses reinfection risk
Finding raises concern over effectiveness of current vaccines