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- A recent study in the journal the Lancet Infectious Diseases held that “hybrid immunity” provides better protection against severe Covid-19.
What is Immunity?
- Immunity refers to the body’s ability to prevent the invasion of pathogens. Pathogens are foreign disease-causing substances, such as bacteria and viruses.
Types of Immunity
There are broadly two types of immunity: active and passive.
- Active Immunity: It develops from the exposure to a disease thereby triggers the immune system to produce antibodies to that disease.
- Active immunity can be acquired through natural immunity or vaccine-induced immunity.
- Infection-induced immunity is defined as the immune protection in an unvaccinated individual after one or more infections.
- Vaccine-induced immunity is acquired through the introduction of a killed or weakened form of the disease organism through vaccination. For Example COVID-19 vaccine.
- Passive immunity: It is provided when a person is given antibodies to a disease rather than producing them through his or her own immune system. For example, A newborn baby acquired passive immunity from its mother through the placenta.
Hybrid Immunity
- Hybrid immunity is defined as the immune protection in individuals who have had one or more doses of a COVID-19 vaccine and experienced at least one SARS-CoV-2 infection before or after the initiation of vaccination
Seroprevalence
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Source: IE
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