Best Covid Vaccine Combination. Astrazeneca is not being offered as a booster jab because it is thought mrna vaccines, such as pfizer and moderna, give a stronger boost to your vaccine protection. 30 countries that have effectively banned uk travellers due to covid surge this combo is thought to offer 86.7% protection against.
People who get the moderna booster shot. On monday (nov 8), the ministry of health's director of. July 1, 2021 5.53am edt tracy hussell ,.