Learn more about the disease » Brazilian authorities call it an epidemic. The Health Ministry said 21 people died from the more severe form of dengue, dengue hemorrhagic fever, or DHF.

Marburg virus belongs to the genus Marburgvirus in the family Filoviridae and causes a severe hemorrhagic fever, known as Marburg hemorrhagic fever (MHF), in both humans and nonhuman primates.

Known as severe fever with thrombocytopenia syndrome, or SFTS, the highly fatal viral hemorrhagic fever spreads to humans through ixodid ticks, which are typically found in mountains, forests and ...