Wild Gorillas and Respiratory Disease from Tourism

Mountain gorillas are vulnerable to human respiratory diseases due to genetic similarity — tourism and conservation fieldwork create disease transmission risks that must be carefully managed.

Key Facts

Mountain gorillas share approximately 98% of human DNA and are susceptible to human respiratory viruses
Tourist groups are limited to 8 people with mandatory minimum distance requirements
Gorilla groups habituated to tourists show higher respiratory disease frequency than unhabituated groups
Metapneumovirus and other respiratory pathogens have caused significant mortality in gorilla groups
COVID-19 raised significant concern about gorilla vulnerability during the pandemic

Welfare Considerations

Gorillas infected with human respiratory viruses experience the same suffering as human patients — fever, respiratory distress, immune response, and in severe cases, pneumonia and death. Because gorillas have no evolved immunity to many human pathogens, infections that are mild in humans can be severe or fatal in gorillas. Tourism provides critical conservation funding, but each tourist encounter represents a disease transmission risk. The welfare cost of respiratory illness in individual gorillas must be weighed against the conservation benefits that tourism funds.

What You Can Do

Maintain strict distance requirements when visiting gorillas — never approach closer than 7 meters
Do not visit gorilla groups if you have respiratory symptoms
Support Gorilla Doctors and Mountain Gorilla Veterinary Project veterinary response programs
Choose tourism operators with robust health screening protocols for guides and visitors
Donate to gorilla health monitoring and vaccination research programs