Transmission risk 1. Goes up with humidity and down with more ventilation and warmer temperatures 2. Higher with smaller distances and fomites
Infectivity 3. Increases with greater viral inoculate (which goes up with more shedding), which is also greater with 4. reduced hygiene and direct contact with mucous membranes. Even at smaller inoculates, 5. an immune incompetent host has higher chances of infection. Happy to provide citations for anything you’re specifically curious about.
Transmission risk 1. Goes up with humidity and down with more ventilation and warmer temperatures 2. Higher with smaller distances and fomites
Infectivity 3. Increases with greater viral inoculate (which goes up with more shedding), which is also greater with 4. reduced hygiene and direct contact with mucous membranes. Even at smaller inoculates, 5. an immune incompetent host has higher chances of infection. Happy to provide citations for anything you’re specifically curious about.