Communities that weather public health emergencies well share a few traits, and none of them are exotic. They have primary healthcare that people actually use, surveillance that spots outbreaks early, stockpiles or supply plans for essentials, and, above all, trusted channels of communication. Recent global experience showed that trust is the scarcest resource; where people believed official guidance, compliance followed, and where they did not, nothing else worked well.
The lessons for individuals are more modest but real. Keep routine vaccinations current, hold a small buffer of medicines and essentials, know how your local health system handles emergencies, and identify reliable information sources before a crisis, since deciding mid panic is when misinformation wins.
For expats, add two items to the list. Understand exactly what your health insurance covers during an epidemic or disaster, and register with your embassy, because border closures and evacuations showed how quickly foreign residents can fall through the cracks of local plans.