https://www.cnn.com/2021/02/16/africa/gorilla-covid-selfie-safety-scli-intl-scn/

Jack Guy, CNN, 16 Feb 2021

  Tourists who take selfies with wild mountain gorillas could put the
  primates at risk of developing Covid-19, according to new research.

  Scientists from Oxford Brookes University, England, looked at hundreds of
  Instagram posts from people visiting the animals in East Africa and found
  most tourists were close enough to gorillas to spread viruses and
  diseases, according to a press release from the university on Tuesday.

  "The risk of disease transmission between visitors and gorillas is very
  concerning," said study lead author Gaspard Van Hamme, an Oxford Brookes
  University alumnus who started work on the study during his masters
  program.

  "It is vital that we strengthen and enforce tour regulations to ensure
  gorilla trekking practices do not further threaten these already imperiled
  great apes."