Could old coronavirus variants ever come back? The virus is evolving through a "continual game of cat and mouse between the virus and our immune systems," an epidemiologist explained. YahooNews

What happened to the variants that once wreaked havoc? “For all intents and purposes, we can consider them gone,” said David Dowdy, an epidemiology professor at Johns Hopkins Bloomberg School of Public Health.

Omicron hospital illness 54% deadlier than flu hospital cases, study finds Adults hospitalized with SARS-CoV-2 Omicron infections in Switzerland died at 1.5 times the rate of those diagnosed as having influenza A or B. CIDRAP

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Analysis of a subgroup of patients hospitalized primarily for COVID-19 or flu found that the risk of death was 2.5 times higher, and the likelihood of ICU admission was 1.7 times higher, among Omicron than flu patients.

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Paxlovid may help prevent hospitalization, death in COVID outpatients CIDRAP

Two new studies, one from the United States and one from Canada, suggest that the oral antiviral drug Paxlovid (nirmatrelvir-ritonavir) is effective in lowering the odds of hospitalization or death from the SARS-CoV-2 Omicron subvariant.

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