What happens when a vaccine enters your body?
- Health

What happens when a vaccine enters your body?

Following an unprecedented year, the news of the rollout of the COVID-19 vaccinations has been welcomed globally, especially in the UK. On 4th January 2020, we heard that the first doses of the Oxford-AstraZeneca vaccine in the UK were administered along with the announcement that over 1 million doses of the Pfizer vaccine have already been administered to the general population. But what actually happens when the vaccine enters the body? Read on to find out how these vaccines give citizens outstanding immunity levels, even after one dosage, and what happens to our body when a vaccine enters the system.  

The roll-out of Covid-19 vaccines in the UK

This week, a hot topic in the UK is the effectiveness of the COVID-19 vaccine after the first and second doses and how we can immunize as much of the population as possible in the shortest amount of time. With this in mind, key government officials have expressed that we should wait 12 weeks as opposed to 3 weeks with the Pfizer vaccine to immunize as greater a population as possible. Well, we’re here to dispel the myths and give you information on the effectiveness of both MHRA approved vaccines in the UK.

So how much protection do the Oxford-AstraZeneca and Pfizer vaccines provide after the first dosage?

Oxford-AstraZeneca efficacy

  • Half dosage: 70.4% effective, on average after 22 days
  • Full dosage: Up to 90% effective

Pfizer/BioNtech Efficacy

  • First dosage: 73% after 22 days
  • Second dosage: Up to 95% a week after the second dosage

What happens when we are immunized with COVID-19 vaccines?

Vaccines have saved countless amounts of lives, and according to the statement from the World Health Organisation, “vaccines have prevented at least 10 million deaths between 2010 and 2015”.

Firstly, after you have received your COVID-19 vaccination, your body is learning to defend against the vaccine’s bacteria. When your body is exposed to the microbe, your body will know how to kill it as your body already had killed it when you got vaccinated.

Also, as your body will know how to kill the virus, you’ll be protecting your loved ones who have not yet been immunized. We’ve all heard of the term ‘herd immunity.’ As more and more people in communities are vaccinated, this will decrease transmission rates, and if you haven’t been immunized, you’ll likely be protected by the people who have.

The side effects to look out for when a virus enters the body

Once you have had the vaccine, it is important to note that you might be feeling a little more tired than usual. According to Dr. Chun Tang, GP at Pall Mall Medical, he advised that it is best getting immunized at a time you are taking it easy and be sure to get an early night after you have had your jab as your body will need time to do the work in building up immunity.

Furthermore, post-immunization many may suffer from redness, swelling, or inflammation at the injection site. This often happens as the vaccine displaces muscle tissue with a small amount of liquid.

You might also feel slightly nauseous after your vaccination. This is especially the case if you have been exposed to other bacteria or viruses. As Dr. Chun Tang explains, “your body might be slow to fight off both.”

Lastly, receivers of the Pfizer vaccine may experience a headache post-injection. This is perfectly normal, and your body is responding to the vaccine the way it should do.

COVID-19 vaccines carving the way to more ‘normality.’

As building immunity to harmful diseases is a key way to live longer, according to Dr. Chun Tang, this key vaccine should start seeing improvements in our day-to-day living. As everyone is tired of the seemingly endless lockdowns, the more dosages we are administering, the step closer we are to herd immunity, with nowhere for the virus to go.

What happens when a vaccine enters your body?

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