#Breaking: #US scientists are developing a strain of the #coronavirus that can be used to deliberately infect volunteers in so-called “challenge studies

#US scientists are developing a strain of the #coronavirus that can be used to deliberately infect volunteers in so-called “challenge studies,” a government agency says.#COVID19https://t.co/l9mWI5ErkO

— Al Arabiya English (@AlArabiya_Eng) August 15, 2020

Source: Twitter