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While the research suggests that natural immunity could be just as good as vaccines at preventing serious illness from COVID-19 infection, the study’s authors encourage people to still get vaccinated, to avoid any complications from any initial infections.
The study, led by the University of Washington and published by The Lancet medical journal, is said to be the “most comprehensive study to date” on the impact of natural immunity for the disease.
“For people who have been infected with COVID-19 at least once before, natural immunity against severe disease (hospitalisation and death) was strong and long-lasting for all variants (88% or greater at 10 months post-infection),” researchers said.
However, catching earlier variants was found to offer reduced immunity protection against re-infection with the more transmissible Omicron, which stands at 36% after 10 months.
The research, partly funded by the Bill & Melinda Gates Foundation, included 65 other studies from 19 countries, looking specifically at those who have not been vaccinated.
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