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- Natural immunity as protective as Covid vaccine against severe illness NBC News
- Covid-19 infection offers strong protection against reinfection for about 10 months, study finds CNN
- Study: Original COVID-19 vaccine could attack boosters given too soon UPI News
- Omicron Still Infected Those With Early Covid Cases, Study Finds Bloomberg
- Study: Natural Immunity From COVID-19 Infection Provides High Protection Against Severe Disease msnNOW
- View Full Coverage on Google News
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