If the immune system becomes impaired, for example with age, can get reactivation disease. If bacteria spread to other parts of body, get miliary tb or even disseminated tuberculosis - both can be fatal. This leads to problems of compliance, especially since there are unpleasant side effects of treatment 8. Recent increases in drug-resistant strains in people between 25 and 45. Influenza Type A - most common, exhibits the most antigenic changes 2.
Virus destroys cilia, then epithelium in the respiratory mucosa.
This may allow invasion of bacteria which may lead to pneumonia. In northern temperate zones, the incidence of influenza is greatest from the end of November through April, particularly between January and mid-March. Probably expedited by indoor crowding, dry air, poor air circulation B. Hantavirus - several cases in 1993 in New Mexico, mainly among Native Americans. Hemorrhagic fever in lungs. Five strains of virus, carried by wild rodents, especially the deer mouse.