Although science still cannot accurately predict how someone will respond Coronavirus vaccineYes, some patterns are being determined based on age, gender, a person’s health status and the dose received.
Some clinical trials have shown side effect According to reports, this phenomenon is usually more pronounced in women and young people, especially after the second dose Inside story with Science alert.
According to studies conducted in the United States, dose two tends to produce more serious side effects in patients suffering from them.most common Three U.S. authorized vaccines (Pfizer, Moderna and Janssen) Pain or swelling at the injection site: nearly 92% Modern Produced this side effect.In test Pfizer, 84% of participants reported that Johnson & Johnson (Janssen) participants accounted for 49%.
Other common side effects They include fatigue, headaches, body or muscle aches. Approximately 65% of vaccine vaccinators in the Pfizer and Moderna trials, and about 38% of patients in the Johnson & Johnson trial experienced fatigue.
For those No covid-19 before, The side effects after the second dose are often more serious.
on The number of participants in the Pfizer trial has doubled Compared with the second dose, they will feel chills and joint pain after the second dose. in the meantime, In Moderna’s paper, The number of people who had chills after the second medication was about five times that of the first time.
This fever In both trials, patients who received the second dose of the drug were more common than those who received the first dose.
One Learn Research from the Icahn School of Medicine at Mount Sinai found that vaccine side effects, such as fatigue, headaches and chills, are more common in women. People who are already immune to the coronavirus There are more people than people who have never been infected before.
About 73% of vaccine recipients who previously had COVID-19 experienced side effects after taking Pfizer or Moderna, while 66% of vaccine recipients received side effects from Pfizer or Moderna They have never been infected before.
“If you have been infected with covid-19, then you have developed Memory unit Regarding this infection, “Baltimore physician Dr. Vivek Cherian told the industry.” If you are exposed to this infection again, your body can basically respond faster and more effectively in the second response. This is why it tends to have stronger side effects in the initial vaccines,” he added.
our immune system It gradually deteriorates with age, which means that the female body Old man They do their best to defend against foreign invaders, including proteins that enter the body through vaccines.
“Young people have a Stronger immune response, So it makes sense that they also have more side effects. “
After taking a dose of Moderna injection, 57% of people Under 65 Will produce side effects, and the side effects of over 65 years old are 48%. After the second medication, nearly 82% of the young group experienced side effects, while nearly 72% of the elderly experienced side effects.
Pfizer The way the data is broken down is slightly different: After the first dose, about 47% of people aged 18 to 55 experience fatigue, while 34% of people aged 56 and over report side effects. After taking the second dose, the numbers increased to 59% and 51%, respectively.
After a single shot JohnsonNearly 62% of people aged 18 to 59 will have side effects, while 45% of people over 60 will have side effects.