It will take time for these effect to manifest. Conferences are organized quite far in advance, so most conferences this year and part of next year would likely

It will take time for these effect to manifest. Conferences are organized quite far in advance, so most conferences this year and part of next year would likely not be able to change locations anyway. But because they are planned in advance they might be even more careful then. They won't just take the status today into account, but also their fears of how much worse it could get.