Slow coronavirus tracking in U.S. might allow variants to spread undetected: media
Contributed by NAMPA / Xinhua.
WASHINGTON, April 8 (Xinhua) -- Researchers worry that the United States is ramping up surveillance of the coronavirus too slowly, allowing its variants to spread undetected in the country, according to science journal Nature.
"As COVID-19 cases surge again in the United States, coronavirus variants are on the rise. But researchers fear that the country is ramping up surveillance of the coronavirus SARS-CoV-2 slowly, allowing these variants -- which evidence shows could make vaccines less effective -- ...