Pharmacy technician prepares a dose of the Johnson & Johnson COVID-19 vaccine (Credit: Michael Ciaglo/Getty Images) Prior to receiving the COVID-19 vaccine, many people tend to ask: Will it hurt?
Will there be symptoms? However, the question of whether repeat vaccinations are best given in the same arm is probably not a question many people have asked – until now.
A new study finds that a person’s immune system may be stronger if their COVID-19 booster goes in the same arm as their previous shot. "The question seems so banal, so trivial that nobody before has thought to ask it," Professor Martina Sester, a biologist and co-author of this study, said in a press release.
Researchers at Sarrland University in Germany analyzed data from more than 300 people who received the mRNA vaccine, along with a booster dose.