Once someone gets a disease, the body functions get damaged and there are chances that they may never recover completely.
Also, treatment of any disease takes time. This means that if someone is suffering from a disease, he or she is likely to be bedridden for some time, even if they are under proper medication
In fact, the person suffering from an infectious disease can serve as the medium for further spread of infection to other people.
Hence, prevention of diseases is better than their cure.
General way of prevention of infectious disease.
Adopt living conditions that are not overcrowded in order to avoid exposure to air-borne microbes.
Safe drinking water should be provided.in order to prevent exposure to water-borne microbes,
It is important to ensure that the environment is clean as this will not allow mosquito breeding and help avoid vector-borne infections
Immune system
Immunity is a special mechanism in the body or property to fight against infectious pathogens.
Immune system consists of certain immune cells which produce allergies, reactions or antibodies against antigens (foreign particles) entering our body.
Immunization
When the immune system first encounters an infectious microbe, it responds against it and then remembers it specifically.
So when the next time that particular microbe enters the body, the immune system responds it with greater vigour. This is the basis of the principle of immunization.
Vaccination:
Vaccination is injecting the microbe we want it to vaccinate against, into the body to attain immunization.
This will not cause the disease but will help prevent any subsequent exposure to the infecting microbe from turning into an actual disease.
Wide varieties of diseases around us have numerous vaccines specific to each disease.
For example, BCG vaccine for tuberculosis, TAB vaccine for typhoid.
Antibiotics:
These are drugs, developed for treating bacterial infections and some other pathogens as well.
Development of drugs for viral diseases are much difficult than developing drugs for bacterial diseases.
Antibiotics are not effective for viral diseases that are caused by viruses that depend on a host cell for their reproduction and survival.
Also, they do not have their own machinery and follow host cell biochemical pathways.
So, the drugs which harm the virus could affect the host also.
However due to advancement in the medical field, many anti-viral drugs have been developed recently despite the difficulties.
