Fill in the blanks.
__________ is the disease for which the first vaccine was developed from the living organisms.
Vaccine
Small pox is the disease for which the first vaccine was developed from living organisms.
Fill in the blanks (a) Many skin diseases are caused by___. (b) Living organisms carrying the infecting agents from one person to another are called ____.
Choose the correct option: Statement 1: The first successful polio vaccine was developed by Jonas Salk.
Statement 2: Polio is an infectious disease caused by a bacteria.