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Nov 11, 2021 · A recent study in Los Angeles County showed that while breakthrough infections can happen, the unvaccinated are 29 times as likely to end up hospitalized from Covid-19 as a vaccinated person.
Jan 20, 2022 · But since no vaccine is perfect, it is expected that we will see COVID-19 breakthrough infections. The agency defines a breakthrough COVID-19 infection as “a small percentage of fully vaccinated persons” who “will still get COVID-19 if they are exposed to the virus that causes it.”.
Oct 12, 2021 · Are vaccinated people who get COVID as likely to spread the infection as unvaccinated people? Scientists don't think so.
- Joe Palca
Nov 23, 2021 · The data showed a rate of about 1 in 5,000 experienced a breakthrough infection between January 17 and August 21, 2021. More recently, some populations have shown breakthrough infection rates of approximately 1 in 100 fully vaccinated people.
- Pre-Omicron Reinfections
- Post-Omicron Reinfections
- Omicron Ba.4 and Ba.5
Reinfections weren’t that common before Omicron. Research found that protection from reinfection typically lasted for at least several months. A 2021 study looking at PCR testing data from 2020 found that a prior infection still gave about 80%Trusted Sourceprotection 6 months after a first infection. A February 2022 studyTrusted Sourcebrought vacci...
Virusescan change over time, and that’s certainly been true with this coronavirus. As changes accumulate, they can make it easier for a virus to escape immunity generated by vaccination, a previous infection, or both. A July 2022 study, still in preprint, looked into the qualities of protection that a pre-Omicron infection provided: 1. Reinfection ...
The new BA.4 and BA.5 Omicron subvariants are now the main drivers of COVID-19in the United States. They’re also very good at escaping the immune system. A July 2022 study looked into the neutralization of BA.4 and BA.5 by antibodiesfrom vaccination or a previous COVID-19 infection. Neutralizing antibodies prevent the virus from binding to a host c...
Jul 13, 2022 · Scientists have similar concerns about BA.2.75, another transmissible Omicron subvariant that is spreading quickly in some parts of the world, including India, but does not yet make up a...
Jul 21, 2021 · For context, as of July 19, out of 159 million fully vaccinated people, the CDC documented 5,914 cases of fully vaccinated people who were hospitalized or died from COVID-19, and 75% of...
