This is Kerala’s fourth outbreak of Nipah, a rare viral infection that at present has no cure or vaccine. Nipah is a zoonotic virus which is transmission of virus from animal to humans, which can be spread through contaminated food or directly between humans on exposure to secretions.The deadly brain-damaging virus is transmitted to humans through direct contact with the bodily fluids of infected bats, pigs or other people.According to Kerala Health Minister, there have been two deaths since August 30, and there are three active cases currently, including a 24-year-old health professional who tested positive for Nipah on Wednesday night.At least 706 people including 153 health workers underwent tests to check the spread of the virus, the results of which are awaited.