Pfizer, AstraZeneca vaccines effective against delta variant, studies suggest

Pfizer and AstraZeneca's COVID-19 vaccines were both highly effective in preventing hospitalization due to the delta variant of the virus that causes COVID-19, according to a study published June 14 by Public Health England.

Two doses of Pfizer's vaccine were 96 percent effective in preventing hospitalization from the delta variant, and two doses of AstraZeneca's vaccine were 92 percent effective. The study included 14,019 people in England infected with the delta strain between April 12 and June 4.