(NEXSTAR) – It’s broadly recognized that the second dose of the Pfizer and Moderna COVID-19 vaccines include extra negative effects, together with headache, fever and chills.
Even then, you shouldn’t skip it, says Dr. Anne Liu, an infectious illness doctor at Stanford College.
“For the two-dose vaccines, we all know that the primary dose is at the very least partially protecting and possibly considerably so, however we solely have information for the quick time period — a month or two from receiving the vaccine,” Liu mentioned.
“We don’t actually know what occurs after that. It’s doable you want the second dose to create a longer-lasting impact.”
Variants pose a “theoretical concern” as properly. It’s been hypothesized that receiving only one dose of the two-shot vaccines could enhance the possibility for a variant to come up, however that is simply hypothetical for the time being, Liu mentioned.
“I don’t suppose we’re seeing [the rise of variants from single doses] a lot but,” Liu mentioned. “We’ll see as virus instances return up if that’s the case.”
“The vaccines weren’t studied in a one-dose regiment, so we don’t actually know but,” she added. “However I’m frightened about it.”
If somebody is frightened of experiencing second-dose signs, Liu recommends searching for out the single-dose Johnson & Johnson vaccine, which has fewer reported negative effects.
Why do some folks expertise extra negative effects from the vaccine than others?
We don’t fairly know, Liu says.
What we do know are traits, and usually, girls and youthful folks are likely to report a higher depth of negative effects than older and male people.
“That’s to not say they’ve extra signs, nonetheless,” Liu mentioned. It’s doable that youthful of us and girls simply report their signs with extra frequency.
“I’m going to make an enormous generalization right here, however our tradition usually discourages males from bringing their signs to consideration,” Liu mentioned.
As for why youthful folks expertise extra signs, that may very well be a results of them having stronger immune techniques.
“Older folks’s immune techniques are likely to get weaker over time,” Liu defined, which means their response to the vaccine will likely be much less intense.
“If in case you have no negative effects, you could have a weaker response,” Liu mentioned.
That’s to not say the vaccine isn’t working. The immune system is complicated and multi-pronged, and negative effects aren’t the one signal the vaccine is efficacious.
“General, the vaccines are very efficient in all teams studied,” Liu mentioned.
Each the Pfizer and Moderna vaccines are about 95-percent efficient at stopping COVID-19 an infection, the drug makers have mentioned.