page = covid-19 : npr

url = https://www.npr.org/tags/804916759/covid-19 analysed @ 2021-07-09 00:09 UTC

The numerals in this illustration show the main mutation sites of the delta variant of the coronavirus, which is likely the most contagious version. Here, the virus's spike protein (red) binds to a receptor on a human cell (blue). Juan Gaertner/Science Source hide caption
July 8, 2021 • New research from China suggests people infected with the delta variant have, on average, about 1,000 times more virus in their respiratory tracts than those infected with the original strain.