The authors also found different side effects were linked with different doses.
Females and young adults are at an increased risk of suffering from side effects after COVID-19 vaccinations. People who take three doses as compared to two may present different side effects, a Japanese study finds.
The study published on Scientific Reports in November studied 272 hospital employees who received the Pfizer vaccine as a second dose between January to June 2022.
None of the participants had a prior history of COVID-19 infection, and all of their symptoms were examined and diagnosed by doctors at the hospital.
They found “higher frequencies of COVID-19 vaccine-related side effects” and “worse outcomes with longer recovery from side effects” among females and younger adults compared to males and elderly adults, the authors wrote.
Third Dose Versus Second Dose
The authors found different side effects were linked with different doses, and the side effects after third dose tend to be more long-lasting and severe compared to the second dose.
Axillary pain occurs much more frequently in people who have taken three doses as opposed to two. Headaches and joint pain is a side effect that tends to be prolonged following the third dose compared to the second or the first dose.
At the second dose common symptoms include asthma symptoms, ear fullness, numbness in the upper arm, and injection at the injecting site.
The author associated the symptoms that occurred after the second vaccine dose with an allergic response while headaches and joint pains after the third dose were linked with inflammation and immune dysregulation.
Health Practitioners Report Similar Findings
Doctors and other studies have reported similar demographics in patients who report symptoms post-vaccination.
Females, particularly those aged between 30 to 50 tend to be at a higher risk of symptoms post-vaccination, according to REACT19’s 2022 post-vaccine survey.
Additional vaccines also create a cumulative effect such that people who have taken more shots tend to be at a greater risk of worse symptoms, internist Dr. Keith Berkowitz, who has treated over 200 long COVID and post-vaccine patients, told The Epoch Times.
By Marina Zhang
