How long can a flu particle stay alive in saliva from cough?

Influenza virus particles can survive in saliva from a cough for up to 1-2 hours. However, the viability and infectivity of the virus particles decrease over time, and the risk of transmission decreases as well. Factors such as temperature, humidity, and the presence of antiviral substances in saliva can also influence the survival of the virus. It is important to practice good hygiene, such as covering your mouth and nose when coughing or sneezing, and washing your hands frequently, to reduce the spread of influenza and other respiratory viruses.