Respiratory syncytial virus, or more commonly known as R-S-V, is a common and highly contagious disease which can infect their airways and lungs.
It often causes mild to moderate illness in younger people, with symptoms including a runny nose, sore throat, cough, fever and aches.
Now, for the first time, a vaccine to combat the respiratory disease has been approved for use in Australia.
Although R-S-V is mostly associated with young children, more than 27,000 older Australians were diagnosed with the highly infectious disease last year.