Booster punches: why some people only feel rough after eating them

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The booster vaccination program is well under way across Wales and the UK, with NHS staff working day and night in the run-up to Christmas to deliver essential doses.

Many people have reported side effects from the booster vaccines, such as the first two doses.

But why do some people only feel unwell after being vaccinated while others are fine, and does it depend on the vaccine you have?

Read more: How long does it take before a booster injection becomes effective?

What are some of the more common side effects?

The side effects of the booster doses are similar to those of the first two doses. The most common side effect is arm pain at the site of the infection, while some people report flu-like symptoms after getting their latest dose.

Dr. Christopher Johnson is interim chair of the Vaccine-Preventable Disease Program at Public Health Wales.

“The vaccine works by triggering a response in your immune system,” Dr. Johnson told WalesOnline. “It’s that response that gives those side effects.”

“The most common of these side effects is just an inflammation of the arm at the injection site.

“What we do know is that the reporting of these symptoms–a sore arm, a few headaches, or a mild fever–to the booster dose is similar to the reporting rate as it was for the first and second doses.”

For some people, symptoms that appear after a vaccination are mild. Others may feel under the weather for several days.

“A lot of people won’t test anything,” said Dr. Johnson. “For a few people, they might get something mild, and it might last a couple of days. But the really important thing is that it doesn’t stop anyone from getting the vaccine.”

“We know that the booster dose in particular is really important in protecting people from Omicron. The recent surge in the immune system is really important with Omicron and it’s the best thing you can do to protect yourself from serious illness and death from Covid.

“And you might get arm pain.”

The following are the side effects listed for the Pfizer and Moderna booster vaccines.

Very common: may affect more than 1 in 10 people at the injection site: pain, swelling, tiredness, headache, muscle aches, chills, joint pain, diarrhea, fever Common: may affect up to 1 in 10 people, redness At the injection site, nausea, vomiting. 100 people swollen lymph nodes feeling unwell arm pain insomnia itching at the injection site allergic reactions such as rash or itching feeling weak or lack of energy/drowsiness decreased appetite excessive sweating night sweats rare side effects: may affect up to 1 in 1,000 people face Temporary one-sided prolapse Allergic reactions such as hives or facial swelling Not known (cannot be estimated from the available data) Severe allergic reaction Carditis (myocarditis or pericarditis) Extensive swelling of the inoculated tip Facial swelling (the face may swell) Occur in patients who have had dermal fillers for the face) Very common (may affect more than 1 in 10 people): Swelling/pain under the armpits Headache, nausea, vomiting, muscle soreness, joint pain and stiffness. feeling very tired Chills Common fever (may affect up to 1 in 10 people): Diarrhea, rash, and redness. Hives or hives at the injection site (some may occur on average 4 to 11 days after injection) Uncommon (may affect up to 1 in 100 people): Injection site itching is rare (may appear in up to 1 in every 100 people): 1000 person(s): One-sided temporary drooping of the face (Bell’s palsy) Facial swelling (facial swelling may occur in patients who have had facial plastic injections.) Dizziness Decreased sense of touch or sensation Frequency Not known Severe allergic reactions with difficulties in Breathing (anaphylaxis) A reaction of increased sensitivity or immune system intolerance (hypersensitivity) Inflammation of the heart muscle (myocarditis) or inflammation of the lining outside the heart (pericarditis) which can lead to shortness of breath Palpitations or chest pain Why suffer Some people have side effects while others don’t?

While some people feel tired and weathered after taking a booster dose, others report no side effects at all.

In an informal survey of WalesOnline employees who received their stimulant dose, 83% reported having arm pain after at least one dose.

But half of the employees who underwent the triple stabbing reported feeling ill in any way. Those who did had a variety of experiences – some felt awful for days, while others only had a mild headache for a few hours.

Dr Johnson said: “Some people will experience a reaction with their first dose or second dose and not with others.

“It’s variable. From our perspective as a vaccine program, there’s nothing that makes you more likely to have side effects than anyone else in the general population.”

While the two booster vaccines have slightly different side effects, Dr. Johnson stresses that one is no worse than the other.

He said, “All of them have slightly different side effects. I wouldn’t say some were worse than others. You get a different pattern with each.”

“It’s always still the case that the most common side effect you’ll get is a little bit of redness or pain at the injection site. This is, for all vaccines, the most common side effect.”

Are vaccines safe?

While many people have reported experiencing some side effects from the Covid-19 vaccine, serious reactions are extremely rare.

Public Health Wales said all types of immunizations are safe and effective, and encourages people to attend any appointment they are offered.

Dr Johnson said: “The key message is that all vaccines are safe and effective, and it’s the best way to protect yourself and your family at this time.

“It’s really important for people to prioritize getting the vaccination when it’s being offered to them. We know getting a booster is the best thing you can do.”

If you haven’t had your first or second vaccination, it’s not too late. People who are not immunized can still take these first two doses in order to gain some protection.

Dr Johnson added: “If you’ve had a full vaccine, getting a booster is important to protect against Omicron. If you haven’t been vaccinated, or you only have one vaccine and you qualify for another vaccine, the best thing you can do is to protect against this virus.” To have the vaccinations that are given to you.

“If you are offered a vaccination appointment, please join the hundreds of thousands of other people in Wales who are getting a booster vaccine and are doing everything they can to protect themselves.

“Join them, prioritize them and go ahead and get them.”

When can I get the booster medication?

First Minister Mark Druckford announced on December 13 that a booster dose would be provided to every adult in Wales by the end of the month, if possible.

Those waiting for their appointment were prevented from contacting the local health board to request an appointment. However, some health boards will offer vaccinations without prior reservation.

Here’s what every health council in Wales has to say about how to get a booster shot.

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