10 Oct 2022 | 10:17 PM UTC
Vietnam: Elevated dengue fever activity reported nationwide through Sept. 25 /update 1
Increased dengue fever activity reported in Vietnam through Sept. 25. Avoid mosquito bites.
Event
Vietnamese officials continue to report elevated dengue fever activity during 2022, with cases more than doubling between July 11 and Sept. 25, bringing the case count to 224,771 since Jan. 1. This case count marks a more than 4.5-fold increase when compared to the 49,759 cases reported over a similar period in 2021. Southern provinces have reported the highest disease activity, followed by the Central and Central Highlands regions. Ho Chi Minh City reported 61,618 cases between Jan. 1 and Sept. 25. This report represents the most complete information available as of Oct. 10.
Context
Dengue fever is a nationwide and year-round threat in Vietnam, but the threat of infection is typically highest during and immediately following the rainy season, which occurs May-October in the north, June-November in the south, and September-December in central coastal areas. Vietnam reported roughly 71,000 cases of dengue fever in 2021 and over 133,000 cases in 2020.
A dengue fever vaccine is available in some countries. It is only recommended for individuals with a history of dengue infection and those in a country with a high dengue fever burden. 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/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.
