The first COVID-19 vaccine tested in the U.S. revved up people’s immune systems just the way scientists had hoped, researchers reported Tuesday -- as the shots are poised to begin key final testing.
The global race for a COVID-19 vaccine boils down to some critical questions: How much must the shots rev up someone’s immune system to really work? And could revving it the wrong way cause harm?
The Military Academy of Medical Sciences of the People's Republic of China said on Tuesday that it had "successfully" developed the recombinant Coronavirus