Posted in Web 12 Reasons Novavax Beats Pfizer For Titles Of Best Covid … September 30, 2021 The Novavax Covid vaccine has the highest efficacy against the original Covid-19 strain and the South Africa variant. It is also the only vaccine with proven efficacy against 3 variants. https://seekingalpha.com/article/4408574-12-reasons-novavax-beats-pfizer-for-titles-of-best-covid-vaccine-and-best-covid-vaccine-stock