> Limited cross-variant immunity after infection with the SARS-CoV-2 Omicron variant without vaccination
Such natural immunity is both safer and more effectively obtained not as an alternative to the vaccine but in addition to it.
There is a real risk of either a second act for delta or a new variant either downstream from omicron but different enough or downstream from delta or both.
https://www.medrxiv.org/content/10.1101/2022.01.13.22269243v...
> Limited cross-variant immunity after infection with the SARS-CoV-2 Omicron variant without vaccination
Such natural immunity is both safer and more effectively obtained not as an alternative to the vaccine but in addition to it.
There is a real risk of either a second act for delta or a new variant either downstream from omicron but different enough or downstream from delta or both.