Background of the study The protection against Coronavirus variants 2019 by pre-existing antibodies due to the current vaccination or natural infection is a global concern. In Ethiopia. case reports show that a significant number of health professionals are reported to get re-infected after vaccination. There are also more studies that revealed the symptomatic SARS-COV-2 re-infection. https://www.pomyslnaszycie.com/life-is-better-with-my-boys-womens-graphic-tee-ice-blue-online-now/