Hi Jamal, Yes, there is quite a bit of evidence (photos and interviews of the scientists) showing that the virus hunters in Wuhan did not always wear appropriate protective equipment while hunting for potential pandemic viruses in remote areas. We describe this and provide citations in VIRAL (will be on page 127 in the paperback). In any case, even with full PPE, you can get bitten or exposed to animals and their pathogens. Accidents happen, especially in an uncontrolled environment, e.g., a cave swarming with millions of live bats that you're trying to catch and sample.