Vaccinated people who were infected by the earlier Omicron subvariants have four times greater protection than vaccinated people who were not infected against the new variants like BA.5, finds a new study, published in the New England Journal of Medicine journal.
For the study, the team accessed the registry of Covid-19 cases at Portugal`s national level. The research indicates that previous infection in vaccinated people (the so-called hybrid immunity) continues to confer immunity for the variants that are known for their ability to evade the immune response.
“Vaccinated people who were infected by Omicron sub variants BA.1 and BA.2 have a protection against infection with subvariant BA.5, in circulation since June, about four times greater than vaccinated people who were not infected at any time,” said lead author Luis Graca from the University of Lisbon.
“Infections in 2020 and 2021 that occurred through infection with earlier variants of the SARS-CoV-2 virus (ancestral lineage, Alpha and Delta variants) also confer protection against infection for the more recent Omicron variant, although this protection is not as high as that of individuals infected with the BA.1 and BA.2 variants, at the beginning of 2022,” Graca added.
“We used the Portuguese national registry of Covid-19 cases to obtain information on all cases of SARS-CoV-2 infections in the population over 12 years of age residing in Portugal,” the researchers said.
“The virus variant of each infection was determined considering the date of infection and the dominant variant at that time. We considered the infections caused by the first variants of Omicron BA.1 and BA.2 together,” they added.
Also read: Covid-19 is still a killer on downlow
This story has been sourced from a third party syndicated feed, agencies. Mid-day accepts no responsibility or liability for its dependability, trustworthiness, reliability and data of the text. Mid-day management/mid-day.com reserves the sole right to alter, delete or remove (without notice) the content in its absolute discretion for any reason whatsoever
Stay connected with us on social media platform for instant update click here to join our Twitter, & Facebook
We are now on Telegram. Click here to join our channel (@TechiUpdate) and stay updated with the latest Technology headlines.
For all the latest Health & Fitness News Click Here
