Quiz - From AstraZeneca-Oxford, a Cheaper, Effective COVID-19 Vaccine
Question 1 / 5
What happened when trial patients were given two full doses of the AstraZeneca vaccine?
What happened when trial patients were given two full doses of the AstraZeneca vaccine?
![](https://gdb.voanews.com/85910103-7631-4116-9a4b-8aa84cddcfca_w250_r1_s.jpg)