What is immunity?
Immunity refers to the capability of the multicellular organism to resist harmful microorganisms. Our immunity is equipped with certain enzymes, cells, and markers that help recognize and tolerate whatever belongs to the self and reject the non-self (foreign invaders). The white blood cells play a major role in defending the body against pathogens, i.e viruses, bacteria, fungi, etc. Naturally, after getting infected, our body makes antibodies against that pathogen to kill it and in the meantime, you might get sick too. But in the future, those antibodies remain receptive towards that specific germ and kill it effortlessly without making you sick.
Symptoms of Immunodeficiency
A person with a weak immune system gets sick more often than needed and portrays a vast range of diseases and disorders, including:
- Frequent cold and flu
- Delayed growth
- Delayed wound healing
- Skin infections
- Digestive issues (nausea, diarrhea, cramps, loss of appetite)
- Internal organ infections
- Low platelet count
- Respiratory infections (bronchitis, pneumonia, sinusitis)