Meaning of immunity

These are the disease-causing organisms that can infect the human body, leading to illnesses.

The immune system helps the body fight against pathogens and consists of various components:

• Physical Barriers: The skin, mucus, and ear wax serve as the first line of defense against pathogens by blocking their entry.
• White Blood Cells: These cells are like soldiers fighting to protect the body from diseases. They recognize, attack, and destroy pathogens.

1. Natural Immunity This is the body's inborn defense against pathogens. Examples include:

   • Skin: Acts as a physical barrier to prevent pathogens from entering the body.
   • Mucus: Found in the respiratory and digestive systems, it traps pathogens and prevents them from causing infections.
   • Ear Wax: Also acts as a barrier, preventing pathogens from entering through the ear.

2. Acquired Immunity This is immunity gained after exposure to specific pathogens or through vaccination. Examples include:

   • Immunity Through Mother: Unborn babies receive immunity via the placenta, and newborns get immunity from breastfeeding.
   • Immunity After Infection: If a person gets infected with a disease like malaria, over time, the body develops immunity against it.
   • Vaccination: Vaccines help stimulate the immune system to recognize and fight pathogens without causing the disease. Vaccines can prevent diseases like tuberculosis, measles, polio, yellow fever, and tetanus.

Vaccines play a critical role in preventing diseases by boosting the body's immunity. It's especially important for infants to get vaccinated, but vaccines are also available for adults to protect against diseases like yellow fever and cervical cancer.

If the body has low immunity, it struggles to fight off infections, making it more vulnerable to diseases caused by viruses, bacteria, and fungi.

• Building immunity, through natural means or vaccination, is essential for good health. Vaccination helps to protect both individuals and communities by reducing the spread of infectious diseases.