COVID-19 and Dengue viruses have a similar disease presentation. That is, they both cause respiratory disease, which presents as a wide range of illness from asymptomatic or mild through to severe disease and death.
The virus that causes Dengue fever is a mosquito-born flavivirus. Covid-19 is a corona virus that started out in bats, took a trip on a pangolin and ended up in Patient Zero, a 50ish man in a Wuhan wet market.
Dengue, an illness caused by any of 4 dengue viruses, is mainly transmitted to people through the bites of infected Aedes species mosquitoes (primarily Ae. aegypti or Ae. albopictus species).
COVID-19, a respiratory illness caused by the virus SARS-CoV-2, is mainly transmitted from person to person through respiratory droplets that are spread when an infected person coughs, sneezes, or talks.
There are some key differences between Dengue flu and COVID-19. COVID-19 seems to spread more easily than Dengue and causes more serious illnesses in some people. It can also take longer before people show symptoms and people can be contagious for longer.
Expert says Patients with fever and respiratory symptoms such as cough, difficulty in breathing, sore throat, loss of smell, and so on would most likely be referred to labs or government clinics that offer COVID-19 tests. If the COVID-19 test comes out negative, then you'll most likely be tested for dengue.
Another important difference is there is a vaccine to protect against Dengue. There is currently no vaccine to prevent COVID-19. The best way to prevent infection is to avoid being exposed to the virus. Because some of the symptoms of Dengue and COVID-19 are similar, it may be hard to tell the difference between them based on symptoms alone, and testing may be needed to help confirm a diagnosis.
Dengue and COVID-19 share many characteristics, but there are some key differences between the two. While more is learned every day, there is still a lot that is unknown about COVID-19 and the virus that causes it.