Malaysia: Elevated dengue fever activity reported nationwide, especially in Selangor, through mid-May /update 1

Event

Authorities in Malaysia report elevated dengue fever activity nationwide, with 14,725 dengue fever cases reported between Jan. 1-May 14. This is compared to approximately 10,139 cases reported over a similar period in 2021. Selangor (10,007 cases) is the most affected state, followed by Kuala Lumpur and Putrajaya (1,272 cases), and Sabah (897 cases). This represents the most complete information available as of May 19.

Context

Dengue fever is a nationwide and year-round threat in Malaysia; however, transmission is typically highest October-March when environmental conditions are ideal for mosquito breeding.

A dengue fever vaccine is available in some countries. It is only recommended for individuals with a history of dengue infection and in countries with high dengue fever burdens. Dengue fever is transmitted through the bite of an infected mosquito. Symptoms of dengue fever include a sudden onset of fever and at least one of the following: a severe headache, severe pain behind the eyes, muscle and joint pain, rash, easy bruising, and/or nose or gum bleeding. Symptoms typically appear 5-7 days after being bitten but can develop up to 10 days after exposure. Dengue fever can progress to a more severe form known as dengue hemorrhagic fever (DHF). DHF can be fatal if it is not recognized and treated promptly.

Advice

If you have previously been infected with dengue fever, consult with your physician regarding vaccination. Avoid mosquito bites and remove standing water to reduce the number of biting mosquitoes. Seek medical attention if symptoms develop within two weeks of being in affected areas. Do not use aspirin or ibuprofen products if dengue fever is suspected, as these could exacerbate bleeding tendencies associated with the disease.