COVID-19 and dengue - CDC
Good comparison chart
https://www.cdc.gov/dengue/is-it-dengue-or-covid.html
COVID-19 and dengue fever: similarities and differences
https://barbadostoday.bb/2021/04/06/covid-19-and-dengue-fever-similarities-and-differences/
Assessment of dengue and COVID-19 antibody rapid diagnostic tests
Conclusion
Despite the high specificity of the COVID-19 RDT, we observed cross-reactions and false-positive results between dengue and COVID-19. Dengue and COVID-19 co-infection was also found. Health practitioners in dengue endemic areas should be careful when using antibody RDT for the diagnosis of dengue during the COVID-19 pandemic to avoid misdiagnosis.
https://virologyj.biomedcentral.com/articles/10.1186/s12985-021-01522-2
Dengue exposure may provide some COVID-19 immunity, researchers say -
this is the article I read September last year, there should be more info on it by now but I didn't pursue it.
https://thehill.com/policy/healthcare/517495-dengue-exposure-may-provide-some-covid-19-immunity-researchers-say
Dengue Fever News
https://www.sciencedaily.com/news/health_medicine/dengue_fever/
Scientists find antibody that blocks dengue virus
Currently, there are no effective treatments or vaccines for the dengue virus. Since there are four different strains of the virus, building up antibodies against one strain can actually leave people more vulnerable to subsequent infection from another strain, which makes finding an effective therapeutic more difficult.
The dengue virus uses a particular protein, called Non-Structural Protein 1 (NS1), to latch onto the protective cells around organs. It weakens the protective barrier, allowing the virus to infect the cell, and may cause the rupture of blood vessels. The research team's antibody, called 2B7, physically blocks the NS1 protein, preventing it from attaching itself to cells and slowing the spread of the virus. Moreover, because it attacks the protein directly and not the virus particle itself, 2B7 is effective against all four strains of the dengue virus.
https://www.sciencedaily.com/releases/2021/01/210113120708.htm
IIT Delhi Develops Device For Early, Rapid Diagnosis Of Dengue
New Delhi: Researchers at the Indian Institute of Technology (IIT) Delhi have developed a handheld device for early diagnosis of dengue. The device can give a dengue test result in one hour.
https://www.ndtv.com/education/iit-delhi-develops-device-for-early-rapid-diagnosis-of-dengue
Globe At Home offers free COVID and dengue insurance vouchers - Philippines
https://mb.com.ph/2021/04/07/globe-at-home-offers-free-covid-and-dengue-insurance-vouchers/
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