Two shots of the Pfizer vaccine is highly effective against the new and rapidly spreading delta variant of COVID-19.
A study of 19,000 people from Public Health England, published Wednesday, found that both doses of either the Pfizer or AstraZeneca vaccines offer protection against symptoms from both the alpha and delta variants.
The Pfizer vaccine has a 93.7% effectiveness rate at preventing symptomatic alpha infections, and 88% for the delta variant.
Two doses of AstraZeneca are 74.5% effective at preventing alpha infections, and 67% for the delta variant.
However, the effectiveness of the vaccines takes a significant dive if the patient only receives one dose of either vaccine.
The study found both vaccine brands to be slightly more than 48% effective against the alpha variant and only about 30% effective against the delta variant if only one dose was administered.
Those who conducted the study suggest prioritizing second doses, especially in vulnerable populations, to prevent coronavirus outbreaks effectively.
Israel's military carried out airstrikes in Rafah on Monday, residents said, hours after Israel told Palestinians to evacuate parts of the southern Gaza city where more than a million people uprooted by the war have been sheltering.
Russia said on Monday it would practice the deployment of tactical nuclear weapons as part of a military exercise after what Moscow said were threats from France, Britain, and the United States.
Heavy rains battering Brazil's southernmost state of Rio Grande do Sul have killed at least 83 people, authorities said on Monday, up from 78 reported a day earlier.
Ukrainian drone attacks on two buses taking people to work killed six people and injured another 35 in the Belgorod region of Russia, the governor said on Monday.
US and Philippine armed forces fired missiles and artillery to thwart a simulated invasion in the Philippines' northern waters facing Taiwan on Monday, in a show of military force and strengthening ties as regional tensions rise.
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