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Yale researchers have found clues as to why certain people experience adverse health effects after the COVID-19 vaccine, which they have dubbed “post-vaccination syndrome."
The thrombosis events associated with the COVID‑19 vaccine may occur 4–28 days after its administration and mainly affects women under 55. [6] [2] [20] Several relatively unusual types of thrombosis were specifically reported to be occurring in those with the reaction: cerebral venous sinus thrombosis and thrombosis of the splanchnic veins.
The new COVID-19 vaccine is hitting pharmacies and doctor’s offices near you. Major chains like CVS and Walgreens are now advertising the updated vaccine, giving people the option to roll up ...
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[3] [11] Vaccination also cannot cause shedding of the COVID-19 virus since none of the COVID-19 vaccines authorized for use by the FDA or the World Health Organization as of December 2021 are live-virus vaccines. [12] [13] Despite this, a COVID-19 "vaccine shedding" conspiracy theory has subsequently emerged, leading to vaccine hesitancy among ...
[70] [71] High efficacy is achieved with full immunization, two weeks after the second dose, and was evaluated at 94.1%: at the end of the vaccine study that led to emergency authorization in the US, there were eleven cases of COVID‑19 in the vaccine group (out of 15,181 people) versus 185 cases in the placebo group (15,170 people). [70]
The vaccine is also strongly recommended for pregnant people because COVID can be more severe in pregnancy and the antibodies can help protect the infant after birth, notes Dr. Cennimo.
In March 2022, Ocugen registered a Phase 2/3 trial for 400 people in the US to compare the immune responses to those in people in the Indian phase 3 trial, as well as safety and tolerability. [44] The trial also aims to assess the vaccine as a booster after other Covid vaccines used in the US.