Question

1. How does a vaccine work?
2. How do microorganisms help us in cleaning the environment?​

Answer 1

a vaccine works by training the immune system to recognise nd combat pathogens, either viruses or bacteria

the microorganisms decompose death organic waste of plants nd animal converting them into simple substance.

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Answer 2

Answer1-
A vaccine is a dead or inactive microorganisms which is injected in your body which helps you protect from bacteria and viruses

Microorganisms help us cleaning the environment as they As they decompose all the dead and decaying matter present on the surface