What could happen if the needle was not sterilised?

CBSE Class 9 CBSE Class 9 Science
1

Rohan was suffering from fever and cold. Doctor has advised blood test to diagnose the disease
In testing centre, Rohan asked the laboratory person to wear gloves and sterilise the needle before taking his sample.
On the basis of the above example, answer the following questions

  1. What could happen if the needle was not sterilised?
  2. What other precautionary measures one should take to ensure good health?
  3. What values are shown by Rohan?
2
  1. If the blood is taken from an infected needle, it may cause entry of infectious microbes into the body, e.g. HIV virus.
  2. Some other precautionary measures that should be taken to ensure good health are as follows
    • A balanced diet
    • Proper vaccination at regular time intervals
  3. Rohan is very conscious about his health. He is well-aware of the various means through which
    diseases get transmitted to a healthy person.