CHI Doctor Advises Caution on Pfizer Vaccine News
A vaccine expert at CHI Health and Creighton University says he's cautiously optimistic about news from drug-maker Pfizer that its COVID-19 vaccine has been 90% effective in trials…
A vaccine expert at CHI Health and Creighton University says he's cautiously optimistic about news from drug-maker Pfizer that its COVID-19 vaccine has been 90% effective in trials…