IMMUNOLOGY

Detailed explanation-1: -A cold is an infection of the upper respiratory system caused by one of about 200 viruses. The flu is also an upper respiratory illness caused by one of several specific flu viruses.

Detailed explanation-2: -A cold and the flu are viral infections. They both affect your respiratory system. This includes your throat, nose, airway and lungs.

Detailed explanation-3: -What Is a Cold? A cold is an infection of the upper respiratory system. This just means it can affect the nose, throat, and sinuses.

Detailed explanation-4: -While this process causes some lung injury, most of the symptoms of the flu are actually caused by the immune response to the virus. The initial immune response involves cells of the body’s innate immune system, such as macrophages and neutrophils.

Detailed explanation-5: -When you get a cold, your body makes antibodies against the virus that caused it. If you’re exposed to the virus again, the antibodies remind your body how to fight it. While it is helpful for your body to make antibodies, there are more than 200 different viruses that cause colds.