Respiratory Viral Diseases
Respiratory viruses are the prominent causative agent of infectious diseases leading to increase in
morbidity and mortality rate worldwide. It generally affect newborn, toddlers and young children.
Symptoms
The oldest and most well-known method of vaccination is to use the whole disease-causing pathogen in a vaccine to produce an immune response similar to that seen during natural infection. Using the pathogen in its natural state would cause active disease and could potentially be dangerous to the individual receiving it and risk the disease spreading to others. To avoid this, modern vaccines use pathogens that have been altered.
Transmission
Many of the germs that cause respiratory (breathing) diseases are spread by droplets that come from coughing and sneezing. These germs usually spread from person to person when uninfected persons are in close contact with a sick person. Some people may become infected by touching something with these germs on it and then touching their mouth or nose.
