(CNN) — For the second straight week, the US Centers for Disease Control and Prevention did not add one new destination to the Level 4 category with the highest risk of travel.

More than a dozen destinations including Canada And some Caribbean countries dropped from level 4 to level 3 on Monday.

The CDC puts the destination at Level 4 “very high” risk if more than 500 cases are enrolled per 100,000 residents in the last 28 days. The Level 3 “High” risk category applies to destinations with 100-500 cases per 100,000 inhabitants in the last 28 days.

In total, 14 destinations have moved to level 3 on April 4th.

• Antigua and Barbuda
•Argentina
• Armenia
• Azerbaijan
• Belize
•Canada
• Grenada
•Iran
• Libya
• Oman
•Panama
• Paraguay
• Saint Lucia
• Suriname

All 14 locations were previously listed at level 4. The CDC advises you to avoid traveling to Level 4 countries.

The CDC threshold for travel health notifications is primarily based on the number of Covid-19 cases at the destination.

The CDC does not include the United States in its advisory list, but it is part of a color-coded global. Travel risk level map.. On Monday, the United States joined its northern neighbors as it transitioned to Level 3 color coding on the map.

Lower risk levels are a bright spot in the travel industry. Still, on April 4, nearly 100 destinations remained at level 4. This is about 40% of the nearly 240 locations covered by the CDC.

among them Broader travel guidanceThe CDC recommends avoiding all international travel until fully vaccinated.

Changes in Level 2, Level 1, and “Unknown” status

Botswana, a major tourist attraction in the Okavango Delta wilderness safari, moved to Level 2 on Monday.

Chris Jackson / Getty Images

In the last 28 days, 50 to 99 Covid-19 cases were seen per 100,000 inhabitants at destinations designated as “Level 2: Covid-19 Medium”. Here are five new entries to Level 2 on April 4th:

• Botswana
• Eswatini
•Iraq
• South Africa
• Dominican Republic

Everything except Iraq was level 3. Iraq used to be level 4.

To enter Level 1: Covid-19 Low, there must be less than 50 new cases per 100,000 residents at the destination in the last 28 days. Six locations moved to level 1 on Monday.

• Ghana
•Jamaica
• Malawi
•Morocco
•Nepal
•Pakistan

All six were level 2. Level 1 is dominated by African destinations. Only seven Level 1 locations are outside Africa.

Finally, there are destinations where the CDC is at “unknown” risk due to lack of information. Usually, but not always, these are small, remote areas, or places of ongoing war or anxiety.

The CDC made three additions to the unknown category on Monday. French Guiana, Greenland When Ukraine.

The ongoing war in Ukraine undoubtedly confused testing, treatment, and collection of Covid-19 cases.

The Azores, Cambodia, Macau and Tanzania are one of the more visited places currently listed in the unknown category. The CDC advises banning travel to these locations simply because the risks are unknown.

Health professionals consider risk levels

According to Dr. Linawen, CNN Medical Analyst, infection rates are a “one guide” to travelers’ personal risk calculations.

We are “in the pandemic stage, and when it comes to getting infected with Covid-19, people have to make their own decisions based on their medical situation and risk tolerance,” Wen said. ..

“Level 4 should be interpreted as a place where Covid-19 community infections are high, so if you go, you’re more likely to get a coronavirus,” said Wen, an emergency physician. .. Professor of Health Policy and Management, George Washington University Milken Institute School of Public Health.

Wen said some people find the risk too high. “Others will say,’I’m vaccinated and boosted, so I’m going to take that risk.’

“Therefore, this really needs to be a personal decision. We now understand that the CDC classifies different levels based on the transmission speed of the community, and that’s basically it.” Wen said. “They do not take into account the individual situation.”

Other travel considerations

In addition to transmission speed, there are other important factors, according to Wen.

“Transmission speed is one guideline,” Wen said. “The other is what is needed and obeyed wherever you go, and the third is what you intend to do when you get there.

“Are you planning to visit a lot of attractions and go to an indoor bar? It’s very different from lying on the beach all day and going to a place where you don’t plan to interact with others. It’s very different. Very different. Different levels of risk. “

Vaccination is the most important factor of safety for travel, as unvaccinated travelers are more likely to get sick and infect others with Covid-19.

It’s also important to consider what to do if you’re away from home and the test is positive. Where is it easy to stay and take the test to go home?

Above image: View of Chateau Frontenac in Quebec City. (AFP via Alice Chiche / Getty Images).