Write the events that take place when a vaccine for any disease is introduced into the human body.

Write the events that take place when a vaccine is introduced into human body.

Describe the events that take place in Metaphase I

When a litre of water is introduced in human blood

When a litre of water is introduced in human blood

When a litre of water is introduced in human blood

When a litre of water is introduced in human blood

When a litre of water is introduced in human blood

Name any disease caused by virus in humans.

Describe the events that take place from the time of entry of the human sperm into the ovum till fertilisation is complete.