Mention if the following statements are True or False

1. Immune system deals with the germs after they have entered the body.
2. Antibodies eat up the germs.
3. Human beings can suffer from all those diseases which attack dogs.
4. Anti-venin injection against snake bite is an example of artificially acquired passive immunity.
5. Mother’s antibodies may reach the foetus through placenta.
6. A person having once suffered from measles usually gets repeated attacks.

Define the term prophylaxis.

Name the four categories of materials used for preparing vaccine.

Name the diseases prevented by:

1. Salk's vaccine
2. BCG vaccine
3. DPT vaccine