There were epidemics of influenza-like illness during the winters of 1915–6 and 1916–7 when mortality was low among infants and children but high among older adults (like SARS-CoV-2 but not influenza). Records suggest that ‘influenza’ epidemics preceding the 1918–9 pandemic were caused by multiple respiratory viruses possibly an undocumented coronavirus.
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| http://dx.doi.org/10.1093/jtm/taaa206 | DOI Listing |
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