A public health study has found that protection from the Pfizer and AstraZeneca vaccines, against the Delta variant of the coronavirus, weakens within three months.
It also found that those who get infected after receiving two shots of either vaccine may pose a greater risk to others than under previous variants of the coronavirus.
Certain countries are already administering a 3rd jab to the public.
What could this mean for share prices for these firms?
Timestamps:
- PFE 01:40
- AZN 02:55
