Some key admittance:
INFECTIVITY
Decreased threshold for infectivity has been modeled in newer variants, suggesting SARS-CoV-2 infection can occur from 100 virus copies of Omicron variant.
TRANSMISSIBILITY
As of 1/22/2024, COVID-19 has caused at least 774,075,242 infections and 7,012,986 deaths
globally. In the United States 1,169,666 deaths have been confirmed. Cases and fatalities are likely underestimated.