[therapsida]

It can be sent in a letter

[Salvavida]

Maybe, maybe not. I heard the virus has a 6 hour life, but I'm not sure what conditions are needed. Not a lot of data on that, and you wouldn't want to alert anyone anyway.

Efficient mass dissemination of the virus on travelers heading to the US, so that the incubation happens in the US. From there you can get very creative.

The only way to cut it off is to require a 21 day stop in another continent, and do away with all non-stops flights. But that is not going to happen……so it's coming.