In COVID-19 clinical update #97, Daniel Griffin covers immunity after infection recognized by CDC, outcomes before and after Omicron, infectious viral load in Delta vs Omicron, PCR vs rapid antigen tests, booster interval shortened to 5 months, risk factors for severe outcomes in vaccinated, cross-reactive memory T cells, vaccine effectiveness ...

by Amy B. Rosenfeld I do not advocate testing for any person vaccinated against SARS-CoV-2 unless they display severe symptoms or live with those who for whom vaccines are not yet approved. I understand that testing and isolation are mechanisms to break virus transmission chains and were used at the ...

The TWiV team reviews the observation that infection with the SARS-CoV-2 Omicron variant causes reduced reproduction and pathogenesis in mice and hamsters. Click arrow to playDownload TWiV 851 (61 MB .mp3, 102 min)Subscribe (free): iTunes, Google Podcasts, RSS, email Become a patron of TWiV! Show notes at microbe/twiv

In COVID-19 clinical update #96, Daniel Griffin reviews Omicron in South Africa, rapid antigen tests, viral coinfections, isolation and quarantine, saliva preferred for Omicron, risk factors for severe disease in vaccinated, Paxlovid dosing, and long COVID. Click arrow to playDownload TWiV 850 (58 MB .mp3, 48 min)Subscribe (free): iTunes, Google Podcasts, RSS, email Become a patron of TWiV! ...

by Gertrud U. Rey Viruses that require access to the host cell nucleus typically get there by exploiting cellular motor proteins for their own transportation purposes. For example, herpesviruses use two cellular proteins called dynein and kinesin to shuttle their cargo to and from the nucleus. However, the exact mechanism ...