A new study that analyzed the coronavirus outbreak in Brazil has found a link between the spread of the virus and past outbreaks of dengue fever that suggests exposure to the mosquito-transmitted illness may provide some level of immunity against COVID-19.

from Times of India https://timesofindia.indiatimes.com/life-style/health-fitness/health-news/exclusive-study-suggests-dengue-may-provide-some-immunity-against-covid-19/articleshow/78247475.cms