I know Cram mentioned he got the J&J vaccine. After seeing this published study that was done with Veterans, you probably want a booster.
By the end of September, Moderna’s two-dose COVID-19 vaccine, measured as 89% effective in March, was only 58% effective.
The effectiveness of shots made by Pfizer and BioNTech vaccine, which also employed two doses, fell from 87% to 45% in the same period.
And most strikingly, the protective power of Johnson & Johnson's single-dose vaccine plunged from 86% to just 13% over those six months.