AstraZeneca's COVID-19 Vaccine On Hold After Sickness
British drugmaker says it paused the testing of its coronavirus vaccine after a volunteer became sick.
United Airlines has already flown its first chartered cargo flight to the U.S. with Pfizer's Covid-19 vaccine on board, according to a source familiar with the planning. AstraZeneca announced Monday that its COVID-19 vaccine is up to 90% effective and even shows signs of reducing asymptomatic spread. It's effectiveness varied during clinical trials, depending on the dosage, but still averaged 70%. Dr. Uzma Syed, an infection disease specialist at New York's Good Samaritan Hospital Medical Center and director of Antimicrobial Stewardship Center of Excellence, joins CBSN's Elaine Quijano to discuss if the variation in effectiveness is something people should be concerned about. It's unclear how long researchers will have to wait before they begin giving the experimental shot again. It's unclear how long researchers will have to wait before they begin giving the experimental shot again.