What do you think of travel the next 2-3 months? Should we avoid it? I was going to travel to Madrid end of March for fun from Krakow, should I delay this to May or even June?
In the next one to two months, your risk is mainly having shared a flight with someone who has coronavirus and being forced into 14 day quarantine.
Later, your chance of actually contracting coronavirus during the flight goes up. Your chance of contracting it in Madrid depends on the prevalence of the disease there relative to Krakow, and on the density of your social contacts in Madrid relative to Krakow. Generally, it would be easier to self-isolate at home, while tourism involves a lot of contacts.
if you normally stay home and go out only for shopping or an occasional walk in nature then you will be safer at home. also depends if your home is rural vs urban. also it would depend on how active / social you are when at home compared to what you plan during a trip.
you have the additional risks of airports, or buses during travel. there is also the risk of being flagged down for testing. if you're positive then a forced quarantine in a foreign country sounds much worse than at home (where you speak the language). to me this would be more annoying and frightening than the virus itself.
on the upside you can probably get really good deals and empty restaurants / bars and other sites usually crowded with people. if I wouldn't live so close with family and kids (which I'd be returning to - AND be 20 years younger), I'd go.
Later, your chance of actually contracting coronavirus during the flight goes up. Your chance of contracting it in Madrid depends on the prevalence of the disease there relative to Krakow, and on the density of your social contacts in Madrid relative to Krakow. Generally, it would be easier to self-isolate at home, while tourism involves a lot of contacts.