[ainiriand]

As long as it is very deadly I think there is a reduced risk of global pandemic, the hosts are easily isolated and the risk mitigated. I think the problem is if this virus stays dormant for a prolonged period or if the symptoms pass for something else during the early stages. Covid-19 had both of those, 72 hours of no symptoms and then 2-3 days of what looks like a regular cold or mild flu.

[jamwil]

The incubation period is 4-14 days, and in rare cases up to 45 days. So it would seem to pose one of the problems you identified.