Protective effects of vaccinations and endemic infections on COVID-19: A hypothesis Published on 2020-10-012023-07-06 Journal: Med Hypotheses [키워드] BCG coronavirus COVID-19 measles SARS Vaccines [저자] Ramachandran Meenakshisundaram, Subramanian Senthilkumaran, Ponniah Thirumalaikolundusubramanian [Category] SARS, PMC URL Pubmed URL [DOI] 10.1016/j.mehy.2020.109849 [Source] pubmed All Keywords 【저자키워드】 COVID-19, coronavirus, Vaccines, SARS, BCG, measles,