Role of previous infection with SARS-CoV-2 in protecting against omicron reinfections and severe complications of COVID-19 compared to pre-omicron variants: a systematic review
M. Arabi, Yousef Al‐Najjar, Omna Sharma, Ibtihal Kamal, Aimen Javed, Harsh S. Gohil, Pradipta Paul, Aljazi Al-Khalifa, Sa'ad Laws, Dalia Zakaria
BMC Infectious Diseases