Here is how different COVID-19 vaccines work on the human body
- 16 Feb 2021
Gulf Today, Staff Reporter
The UAE Ministry of Health and Prevention said vaccines prepares the body to fight infection caused by the virus or different bacteria.
The health official during a media briefing on coronaviruis made the statement.
The health authorities said the body's immune system recognises the foreign organism and produces antibodies to fight it.
The vaccine prepares the body to fight infection caused by the virus or different bacteria, and the vaccines contain inactive or weak parts of the organism that causes the disease, or the genetic code that creates the same response and stimulate the immune system.
The Sinopharm vaccine works using dead viral particles to expose the body's immune system to the virus without risking a reaction. The vaccine stimulates the human immune system and forms antibodies to resist the COVID-19 virus.
Authorities said that Pfizer-Bionic vaccine works with RNA technology.
This means that part of the gene code is injected into the body, prompting it to start producing s-protein on the shell of the virus that triggers immune response.
Both AstraZeneca and Sputnik V vaccine are based on a viral vector, it is placed on another virus called adenovirus, which is modified and molecules of the emerging #Covid19 virus are added to it. The virus is considered weak but sufficient to produce antibodies.
The UAE Health sector said, “Many people focus on differences in vaccines and how they are manufactured and preserved, but despite these differences, vaccines are similar in stimulating the body by producing antibodies, giving the necessary immunity in the event of exposure to the virus.”
Sinopharm’s clinical trials have shown that its vaccine can reduce the chances of contracting COVID-19 and prevent complications from the disease, but no one can yet determine how long protection will last.
Meaning that these cells can remember the pathogen, if the infection is encountered again, and stimulate the immune system to reproduce antibodies that are resistant to the virus.
This applies to all vaccines developed to treat COVID-19.
The level of antibodies can decrease over months, but the immune system also
contains special cells called "memory cells" that may retain COVID-19 information for long periods of time that may reach years.
Researchers found that these cells underwent cycles of mutations even after recovery and were able to produce effective antibodies more than those initially caused by the infection. Tests have also indicated that these antibodies are able to identify mutated strains.
Authorities said, “We are currently working with relevant health authorities to determine the require vaccination administration schedule as is the case with other vaccines such as the flu vaccine to ensure that people are adequately protected.”