Germany and France among countries resuming use of the AstraZeneca vaccine after regulators shot back
Exclusive: The US plans to send four million doses of AstraZeneca vaccine to Mexico, Canada – officially
mRNA vaccines stimulate lymph nodes for long-term protection; The accuracy of the COVID-19 test may vary depending on the time of day
Exclusive: Regular booster vaccines are the future in the fight against the COVID-19 virus, expert says
