COVID-19 risk in most countries is high. You should avoid nonessential travel to high-risk destinations, especially if you or someone you live with is at increased risk for severe illness. You can also check the COVID-19 risk level of specific destinations with this resource.
If you do choose to travel internationally, you may want to consider that some healthcare systems are overwhelmed, and there may be limited access to adequate medical care in affected areas. Many countries are also implementing travel restrictions and mandatory quarantines, closing borders, and prohibiting non-citizens from entry with little advance notice.
Keep in mind that if you choose to travel internationally, your travel plans may be disrupted in several ways. If you get sick or are exposed to a person with COVID-19 during your trip, you may be isolated or quarantined and your return to the United States may be delayed. Check with the Office of Foreign Affairs, Ministry of Health, or the US Department of State, Bureau of Consular Affairs, Country Information page for more details.