Two new studies show vaccination provides additional protection after Covid-19 infection.

Study 1: Risk of SARS-CoV-2 reinfection and COVID-19 hospitalisation in individuals with natural and hybrid immunity: a retrospective, total population cohort study in Sweden – The Lancet Infectious Diseases

Study 2: Effectiveness of CoronaVac, ChAdOx1 nCoV-19, BNT162b2, and Ad26.COV2.S among individuals with previous SARS-CoV-2 infection in Brazil: a test-negative, case-control study – The Lancet Infectious Diseases

Commentaries:

Interplay of infection and vaccination in long-term protection from COVID-19 – The Lancet Infectious Diseases

Effectiveness of SARS-CoV-2 vaccines in the post-natural infection world – The Lancet Infectious Diseases

Vaccines offer substantial extra protection after COVID-19 infection – CIDRAP

Had COVID? Getting Vaccine Boosts Resilience Even More, Studies Show – HealthDay

Related:

Retrospective cohort study: Pfizer vaccine reduces the risk of reinfection after recovery from Covid-19.

Cohort study: Protection against SARS-CoV-2 after Covid-19 vaccination lasts longer in patients with previous infection.

Commentary on Twitter (thread – click for more)

THREAD | New studies in @TheLancetInfDis confirm #COVID19 vaccines provide extra protection for those with immunity from previous infection, especially against severe disease ⤵️

(Cases of reinfection from omicron variants not included)

— The Lancet (@TheLancet) April 1, 2022