In which ways the following diseases can spread and infect a healthy person?

(a) AIDS
(b) Influenza
(c) Cholera

a)AIDS

AIDS spreads through the following ways:

• Unprotected sexual interaction with an already infected person.
• Reusing needles used by an infected person.
• From an infected mother to the baby through the placenta.
• Blood transfusion from an infected person.

(b) Influenza

• Influenza is a viral infection that attacks the respiratory system - nose, throat and lungs.
• Influenza is commonly called the flu. At first, the flu may seem like a common cold with a runny nose, sneezing and sore throat.
• It transmits through air/droplet, direct contact, fomite-borne. Therefore, if we come in contact with a person who got influenza, we are likely to get sick as well.

c) Cholera

• Infection of cholera occurs through contaminated water and also by dust and flies that sit on excreta and may transfer germs to exposed food.
• Food handlers with dirty hands can also transmit the cholera germs.