# CDC International 4 Level Travel Notice System Math Calculations

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• veithmoore
In summary, the 4 level system categorizes international destinations at a level four if the 28 day infection rate per 100,000 is greater than 500. The population of Costa Rica is 5,094,000 and the WHO reported 5,488 infections on 2/11/2022. To calculate the infection rate per 100,000, you would divide the population by 100,000, which equals 51. This means that there were 108 cases in Costa Rica, well below the 500 case threshold for a level four. Even the highest infection number in the last 28 days, 17,000, is only 333 per 100,000, still below the threshold. However,
veithmoore
TL;DR Summary
The 4 level system categorizes international destinations at a level four the 28 day infection rate per 100,000 > 500.
The population of Costa Rica is 5,094,000.
The WHO had 5,488 infections for 2/11/2022.
How would you calculate the infection rate per 100,000?
5,094,000 ÷ 100,000 = 51
5,488 ÷ 51= 108 cases, well below the 500 case threshold for a level four.
Of note, the highest infection number I saw in the last 28 days was 17,000, which is 333 per 100,000, still < 500.
Thanks!
The 4 level system categorizes international destinations at a level four if the 28 day infection rate per 100,000 > 500.

The population of Costa Rica is 5,094,000.

The WHO had 5,488 infections for 2/11/2022.

How would you calculate the infection rate per 100,000?

5,094,000 ÷ 100,000 = 51

5,488 ÷ 51= 108 cases, well below the 500 case threshold for a level four.

Of note, the highest infection number I saw in the last 28 days was 17,000, which is 333 per 100,000, still < 500.

I would like to travel to Costa Rica next month, but not at a level 4 infection rate.

veithmoore said:
The WHO had 5,488 infections for 2/11/2022.
That's for one day? The CDC definition uses the cases during the last 28 days. Using data from coronalevel.com, Costa Rica had 783,000-643,000 = 140,000 new cases from January 23 to February 20.
140,000/51 = 2750 which is deep in category 4. Close to three percent of the population became a confirmed case in the last 28 days.

berkeman and jim mcnamara

## 1. What is the CDC International 4 Level Travel Notice System?

The CDC International 4 Level Travel Notice System is a system used by the Centers for Disease Control and Prevention (CDC) to inform travelers about health risks associated with travel to specific countries. It categorizes countries into four levels based on the severity of health risks and provides recommendations for travelers based on these levels.

## 2. How are countries assigned to different levels in the CDC International 4 Level Travel Notice System?

Countries are assigned to different levels based on several factors, including the current COVID-19 situation, the level of community transmission, and the capacity of the country's healthcare system. The CDC also considers other health risks such as outbreaks of other infectious diseases and natural disasters.

## 3. What are the four levels in the CDC International 4 Level Travel Notice System?

The four levels in the CDC International 4 Level Travel Notice System are Level 1: Low, Level 2: Moderate, Level 3: High, and Level 4: Very High. These levels indicate the current health risks in a country and the recommended precautions for travelers.

## 4. How does the CDC International 4 Level Travel Notice System help travelers?

The CDC International 4 Level Travel Notice System helps travelers by providing them with important information about health risks in specific countries. This allows travelers to make informed decisions about their travel plans and take necessary precautions to protect their health. It also helps travelers understand the level of risk associated with their destination and plan accordingly.

## 5. How often does the CDC update the travel notices for different countries?

The CDC regularly monitors the health situation in different countries and updates the travel notices accordingly. However, the frequency of updates may vary depending on the severity of the situation. Travelers are advised to regularly check the CDC website for the latest updates on travel notices for their destination.

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