The US Centers for Disease Control and Prevention added 22 destinations to its highest-risk category for travel on Tuesday, including Australia, Argentina and Egypt.
The CDC places a destination at "Level 4: Covid-19 Very High" risk when more than 500 cases per 100,000 residents are registered in the past 28 days.
In contrast, the CDC added just two nations — Canada and Curaçao – to Level 4 last week.
Twenty-two destinations were also added on Tuesday to Level 3, which is the CDC’s “High” risk category. The Level 3 category applies to destinations that have had between 100 and 500 cases per 100,000 residents in the past 28 days.