@Marina1328 I don't see the point in asking guests to provide current stats on their country/state or on travel restrictions, for several reasons:
1 ) The guest probably won't have fully accurate information
2 ) You can find the current info on the internet if for whatever reason you think it's relevant
3) Unless it's a last-minute booking, there's no way to know what the situation will be on the guests' actual travel date
I wouldn't even consider asking guests about their personal health status. As @Helen3 said, they're unlikely to answer truthfully if they feared it would affect their booking. And while it's pretty standard to ask about the purpose of your guests' visit, it's not really any of your business what they do or who they see when they're away from the property.
Given the global reach of the pandemic, the only way to handle this that makes any sense is to assume that all upcoming guests are potential carriers of the virus - symptomatic or otherwise - and take the measures and precautions that would be appropriate to that.