Johnson & Jonson vaccine 66% effectiveJohnson & Jonson vaccine 66% effective
Johnson & Johnson Vaccine May Offer Faster Path to Herd ImmunityJohnson & Johnson's vaccine appears to protect against COVID-19 with just one shot. Not as strong as some rivals but it's still potentially helpful for a world in dire need of more doses. Betty Yu..
Johnson & Johnson's COVID-19 Vaccine Still Has Advantages Despite Less EffectivenessOverall, Johnson & Johnson's vaccine is 85% effective in preventing severe disease with a single shot.