Here are the most important facts you need to know about the COVID-19 vaccines.
One vaccine shot does not immunise people from getting infected again. Only Johnson & Johnson has developed the one-dose vaccine. The other companies have vaccines that need a booster to make it work.
Johnson & Johnson has asked US regulators to approve the world’s first single-dose Covid-19 vaccine to boost supply of vaccines.
There are two types of vaccines. One is “sterilizing” which makes it possible to interrupt the transmission of the virus and vaccine that protects against the disease but does not prevent the transmission of the infection.
The Pfizer and Moderna vaccines allowed in the pandemic’s context have not proven that they could prevent the transmission of the disease when a vaccinated person is infected. They are not sterilising.
But they are doing their job, that is protecting the vaccinated population for the time being.
Besides the J&J vaccine, the other vaccines need a booster shot to strengthen its effects. We will explain how this works later.
Are you immune to Covid after the vaccine? It takes a few weeks for the body to build immunity.
And at the moment, it takes a double shot for immunity to build. The body will only build the immunity to COVID-19 after the double shot.
The receiver of the vaccine must wait two weeks at least to get the second shot. It’s possible a person could be infected with the virus during that time.
Can someone vaccinated for coronavirus spread it? A world-renowned epidemiologist in Seattle says it is still possible to spread the virus after being vaccinated.
The expert also says masking up and social distancing remains critical.
After taking the first shot and after the second shot to allow the body to build the immune system.
How booster vaccines work?
COVID-19 is not the only type of virus that needs a booster. Take the MMR vaccine – measles, mumps and rubella – which is given to babies. It prevents these deadly childhood infections.
About 40% of people who received only one dose are not protected. Not against the three viruses compared to 4% of those who received the second dose.
So beating COVID-19 needs a booster or two doses of vaccines. When the immune system first encounters a vaccine, it activates two important types of white blood cells.
The first are B plasma cells, which mainly focus on making antibodies this type of cell has a limited lifespan of a few weeks and disappears.
Our body needs T Cells that identify a particular pathogen and kill it. To get more of these T Cells in our body, we need the booster vaccine. The second injection of COVID-19 vaccines will boost the T Cells.
T Cells are also called memory cells and stay in the body for decades until they hit their target. It means immunity to viruses or infections can sometimes last a lifetime.
The booster dose will re-expose the body to antigens or the pathogen molecules that trigger the immune system.
The boost gives us a higher frequency of memory T cells. And to some extent the same for the size of the memory B cell group. That will also produce better quality antibodies.
How effective is COVID vaccine?
Both Pfizer and Moderna report their vaccines show approximately 95% efficacy. They can prevent both mild and severe symptoms of COVID-19.
This level of efficacy appears to apply across age groups. Racial and ethnic groups, and both sexes, as reported in the Pfizer trial.
What happens if you get Covid after the vaccine? There is tiny chance you contract COVID after receiving two doses of the vaccine.
But experts say you can still be infected and become ill. But your disease is likely going to be mild
How many people are vaccinated for Covid?
Since Dec. 14, over 17 million people got vaccinated in the US. The numbers of vaccinated people are growing worldwide. In some countries, like the UK the number of infected is falling, but the country is still pursuing its campaign of lockdowns. For safety measures.
In the US, the number of death is falling, and that is good news for the great America. The U.S. is currently administering around 1.3 million shots a day.
How long do Vaccine Side Effects last Covid?
People may experience chills, fatigue and headaches after taking the vaccines. In clinical trials, mild-to-moderate side effects within a week were common. Most side effects usually occur within a day or two and go away in a few days.
Are smokers more vulnerable to contracting COVID-19?
Not if they do not share the cigs or pipes. And if they constantly wash hands and refrain from physical contact with friends.
But cigs can transmit the virus if an infected person touches it with their lips. There is also the transmission from hand to mouth.
So keep washing hands, do not touch your face too much. Keep social distancing and look forward to getting the jabs!