Question
What measure would you take to prevent water borne diseases ?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

OR
During the secondary treatment of the primary effluent how does the significant decrease in BOD occur?OR
Write the events that take place when a vaccine for any disease is introduced into the human body.OR
How does a vaccine for a particular disease immunise the human body against that disease?OR
Name and explain the type of immunity that is provided by injecting microbes deliberately during immunisation into the human body.