Natural immunity to COVID-19 typically lasts about 3 to 6 months against reinfection, though protection drops faster against newer variants.
UCLA Health
Duration of Protection
Against reinfection: Measurable antibody levels and protection against catching a mild or moderate infection start to fade after 3 to 6 months. Newer variants can bypass natural defenses more easily.
Gavi, the Vaccine Alliance
Against severe disease: Protection against severe illness, hospitalization, and death lasts much longer—often remaining strong for 10 months or more.
National Institutes of Health (NIH) | (.gov)
Variant changes: Mutations in the virus make it easier for reinfection to happen over time.
Severity of illness: People who had a severe COVID-19 infection sometimes build higher initial antibody levels than those with mild or asymptomatic cases.
BASS Medical Group
Hybrid Immunity
Getting vaccinated after recovering from a COVID-19 infection creates hybrid immunity. This combination provides a stronger, broader, and longer-lasting defense against current and future variants than natural infection alone. Health experts often suggest waiting 3 to 4 months after a natural infection before getting a booster shot.