Illness stage is when specific severe signs and symptoms appear.

Convalescence stage is recovery stage.

Infectious Diseases are also called as

non-communicable diseases.

The diseases or infection is still communicable in the recovery stage.

Bacteria, fungi, and virus are pathogens which does not cause diseases to the host.

The most common reservoir of pathogens is

the human body.

Tiredness, slight fever, and runny nose are some of the indications of Illness stage.

Coughing and sneezing are direct modes of transmission that causes infection.

Prodromal stage is when there are specific signs and symptoms appearing.