evidence: The Claim and Our Verdict - The claim: A tweet published Dec. 5, 2021 claims that COVID-19 vaccination will cause Vaccine Acquired Immunodeficiency Syndrome (VAIDS). - Professor Poon Lit-man Leo, head of the Division of Public Health Laboratory Sciences at the University of Hong Kong, told HKBU Fact Check that the so-called VAIDS claim is misinformation. "There is no evidence to suggest that COVID-19 vaccines can suppress immune responses. There are studies showing that COVID-19 vaccine-induced antibody response wanes after vaccination. Thus, its protective effect against infection might be reduced after a few months of vaccination…But, this is not saying the COVID-19 vaccine can weaken our immune system," Poon said in the email. [...] - Reuters Fact Check, "Fact Check-‘VAIDS’ is not a real vaccine-induced syndrome, experts say; no evidence COVID-19 vaccines cause immunodeficiency," Feb. 11, 2022.