(10 Nov 2020) LEAD IN: Scientists are advising caution following Pfizer’s announcement that its COVID-19 vaccine candidate is more than 90 percent effective. The vaccine has been tested on 43,500 people in six countries without raising safety concerns, but not…

(10 Nov 2020) LEAD IN: Scientists are advising caution following Pfizer’s announcement that its COVID-19 vaccine candidate is more than 90 percent effective. The vaccine has been tested on 43,500 people in six countries without raising safety concerns, but not…

(16 Jul 2020) LEAD IN: An array of new technologies are being used to try to produce a vaccine which can protect the world from COVID-19, but scientists say that could be months away at the very least. Here’s a…

The 1st experimental COVID-19 vaccine in the US revved up people’s immune systems just the way scientists had hoped, researchers reported Tuesday. The vaccine will undergo its most important test later around July 27: a 30,000-person study. (July 14) Subscribe…