Abstr #2195 COVID PrEP in Rheum pts who did not seroconvert after 3rd dose - anti-SARS-CoV2 IgG levels ↑ after day 1 - Saliva IgG also ↑ up to day 14 - one reported COVID+ w mild symptoms @RheumNow #ACR22 https://t.co/um2JFNMhpj