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One In Four People Suffer Side Effects From AstraZeneca, Pfizer Jabs

The drop in infection at least 21 days after the first dose for Pfizer is 69 percent and for AstraZeneca 60 percent, the findings showed

One in four people experiences mild, short-lived systemic side effects like headache, fatigue, and tenderness after receiving either the Pfizer or AstraZeneca vaccine, according to a new study published in the journal Lancet Infectious Diseases. Most side effects peaked within the first 24 hours following vaccination and usually lasted 1-2 days, and majorly among women under 55 years of age, said researchers from the King’s College London.

“The data should reassure many people that in the real world, after-effects of the vaccine are usually mild and short-lived, especially in the over 50’s who are most at risk of the infection,” Tim Spector, Professor of Genetic Epidemiology at the varsity.”The results also show up to 70 percent protection after 3 weeks following a single dose,” Spector said.

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The team analyzed data from 627,383 users of the ZOE Covid Symptom Study app who self-reported systemic and local effects within eight days of receiving one or two doses of the Pfizer vaccine or one dose of the AstraZeneca vaccine between December 8 and March 10. The findings showed 25.4 percent of vaccinated people indicated suffering from one or more systemic (excluding the area where the injection took place) side effects, whereas 66.2 percent reported one or more local (at the injection site) side effects.

Side effects
A whopping 57.2 percent and 50.9 percent reported tenderness after the first and second dose of Pfizer vaccine. Pixabay

About 13.5 percent of participants reported side effects after their first Pfizer dose, 22.0 percent after the second Pfizer dose, and 33.7 percent after the first AstraZeneca dose. The most reported systemic side effect was headache — 7.8 percent of people after the first Pfizer dose and 13.2 percent after the second Pfizer dose, while 22.8 percent of people reported headache after the first dose of the AstraZeneca vaccine.

Nearly 8.4 percent and 14.4 percent of people reported fatigue after the first and second dose of Pfizer vaccine, while 21.1 percent reported fatigue after their first dose of AstraZeneca vaccine. A whopping 57.2 percent and 50.9 percent reported tenderness after the first and second dose of Pfizer vaccine, and 49.3 percent after the first dose of AstraZeneca vaccine, the researchers said.

ALSO READ: Vaccine Delay Will Give Virus Opportunity To Develop New Variants: Experts

The study also reports a significant decrease of infection rates from 12 to 21 days after the first dose of the Pfizer (58 percent reduction) and AstraZeneca (39 percent reduction) vaccines compared to a control group. The drop in infection at least 21 days after the first dose for Pfizer is 69 percent and for AstraZeneca 60 percent, the findings showed.

Moreover, Covid survivors were three times more likely to have side effects that affect the whole body after receiving doses of the Pfizer vaccine than those without known infection and almost twice more likely after the first dose of the AstraZeneca vaccine.(IANS/JC)

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