India, April 26 -- UK residents planning to travel to certain destinations have been put on alert as cases of a dangerous viral illness have grown in recent years. Compared to the previous year, when yellow fever cases had grown 5.6 times. The yellow fever is transmitted by mosquitoes across parts of Africa, Central and South America, and more. This disease can trigger severe illness that can be a life threat.

Here's everything you need to know about the UK travellers' alert and more.

UK Travellers on Alert

In the latest Travel Health Pro update, a warning of yellow fever poses a risk across 13 countries and territories within South and Central America. Since the start of 2026, a total of 41 confirmed cases, including 18 deaths, have b...