Respiratory tract infections (RTIs) are very common triggers of asthma7, 16, 42. These are the number one asthma trigger in children42.
RTIs are any infection of the sinuses, throat, airways or lungs. They're usually caused by viruses, but they can also be caused by bacteria. RTIs can spread in a variety of ways including direct and indirect contact7.
The best way to prevent the spread of infection is to practice good hygiene and promptly treat any signs of infection. Vaccines can help protect against some RTIs7.