Question

Hello.................................................,.....what's a vaccine.thankyou​

Answer 1

A vaccination is a medical substance that mimics a pathogen in a non-harmful way. When our immune system defeats it, it recalls how to combat the genuine infection when it enters our system. As a result, it shields us against sickness.

Step-by-step explanation:

I hope this helps!

Answer 2

A vaccine is a medical material that mimics the pathogen, but in a harmless way. When our body's immune fights it off, it remembers how to fight the real pathogen when it enters our body. So, it protects us from diseases.