Common cold virus antibodies protect against COVID-19
Interesting that they wanted to keep everyone, especially children, isolated and away from others where they might acquire protection from a seasonal cold.
https://www.sciencedirect.com/science/article/pii/S1386653221001141
Lack of antibodies against seasonal coronavirus OC43 nucleocapsid protein identifies patients at risk of critical COVID-19
Highlights
Does prior infection with seasonal human coronavirus OC43 protect against critical COVID-19?
Findings: In an international multi-center study inpatients without anti-HCoV OC43 NP antibodies had an increased risk of critical disease.
Meaning: Prior infections with seasonal HCoV OC43 have a protective effect against critical COVID-19.
Conclusions
Our results suggest that prior infections with seasonal human coronaviruses can protect against a severe course of COVID-19. Therefore, anti-OC43 antibodies should be measured for COVID-19 inpatients and considered as part of the risk assessment for each patient. Hence, we expect individuals tested negative for anti-OC43 antibodies to particularly benefit from vaccination against SARS-CoV-2, especially with other risk factors prevailing.