Healthcare Studies suggest Dengue may provide immunity against COVID-19 Updated : September 22, 2020 03:30 PM IST This finding raises the possibility of the cross-reactivity between dengue's Flavivirus serotypes and SARS-CoV-2. Brazil has more than 4.4 million cases, the world's third-highest number of coronavirus cases behind the US and India. Subscribe to Moneycontrol PRO at just Rs.33/- per month for the first year. Use code SUPERPRO. Limited period offer. Available on Web and Android.