If you have a more serious respiratory infection, wait at least two weeks before engaging in physical activity. (parsleyhealth.com)
The fact that vaccines typically don't work as well in older people presents a challenge to influenza vaccine makers, particularly because the illness often results in serious respiratory infections in frail patients such as elderly nursing home residents. (sciencedaily.com)
This highly contagious and, for some dogs, potentially serious respiratory infection is caused by canine influenza virus H3N2, or CIV H3N2 for short. (pilchuckvet.com)