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“Vaccines are dead cells that are introduces to body for sake of killing microbes or adding immunity to body against particular disease”
Role of Vaccines in development of immunity:
Vaccines increase immunity in a body against infection.
Sometime these type of infections are not deadly and even not cause illness but also they did not show any type of symptoms.
Therefore, when vaccines injected some imitated vaccines show symptoms.
When the infection goes over then memory develops by T lymphocytes against this disease in a body for future.
However, vaccines did not give immunity to the body at once after injection.
It may take several days to get immune after getting vaccines.
By vaccination, you get immune to different diseases.
If someone is not vaccinated it may cause risk for others as well because he/she is capable to spreading disease to others.
Risk of outbreaks can develop.
An outbreak is a cluster of cases of particular disease within a community.
Outbreaks in epidemics caused by unvaccinated individuals and becoming more common.
For example, now a day in Pakistan (December 2017 and January 2018) swine flu is spreading in different cities.
Five people are dead due to influenza virus because they are not vaccinated for swine flu /influenza virus.
An outbreak of seasonal influenza has seen in Multan and Lahore and 23 lives have claimed out of 47 total patients.
There are different types of vaccines
There are several types of vaccines in use. They are
Description: Vaccines have different types as well as different advantages and some disadvantages.
1: Attenuated vaccines:
This type of vaccines used to increase immunity and made up of virulent microorganism whose effectivity reduced to from virulence. These vaccines are activated (live).
1. The virus can spread and can cause disease.
2: Inactivated vaccine:
1. No spreading of viruse and did not cause disease.
1. They did not cause any disease as well but some time can cause side effects to mount immune system.
4: conjugate vaccines:
They are composed of strong and weak antigen attachment by covalent bonds to increase to effectivity of weaker antigen.
1. This vaccine show up very important property, which is safe vaccination or safety because it did not cause any harmful disease of any side effects like live attenuated vaccination.
5: DNA vaccine:
In this type of vaccine, genetically engineer DNA introduced to the body, which can produce itself antigen.
6:Recombinant proteins vaccine:
This vaccine made up of protein subunit of pathogens /virus who show their part in immunity. They can also consist of antigens.
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