Philippines: Increased number of dengue fever cases reported in Benguet and Pangasinan provinces, including Baguio city, through July /update 1

Event

Filipino health officials have reported elevated dengue fever activity in Pangasinan and Benguet provinces, including Baguio city, during 2021, with roughly 3,533 cases reported as of July 26 compared to 1,692 cases reported over a similar period in 2020. Pangasinan is the most affected (2,834 cases) province, followed by Benguet (483 cases), with Baguio city reporting 416 dengue fever cases. Dengue fever activity is likely to remain elevated as the rainy season continues. This represents the most complete information available as of Aug. 2.

Context

Dengue fever is endemic to the region, and the risk of transmission is highest during and immediately following the rainy season, which typically occurs May-November. Authorities reported roughly 83,155 cases of dengue fever in the Philippines during 2020, roughly 420,453 cases during 2019, and 216,290 cases in 2018.

A dengue fever vaccine is available in some countries. It is only recommended for individuals with a history of dengue infection and in a country with high dengue fever burden. Dengue fever spreads through the bite of an infected mosquito. Symptoms of dengue fever include a sudden onset of fever and at least one of the following: severe headache, severe pain behind the eyes, muscle and/or 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.