According to the team behind the app, which analyses the data submitted by users, the after effects of vaccination, such as fatigue and headache, can feel a lot like COVID-19 symptoms.
As the team explains, COVID-19 vaccines work by using a harmless version or component of the SARS-CoV-2 coronavirus to train the immune system, so when we encounter the virus for real we’re able to fight it off.
“This ‘training’ response can feel a bit like the effects we get when we’re fighting off a real infection, including headaches, fever, chills or shivers, tiredness (fatigue), muscle or joint pains, diarrhoea and feeling sick (nausea),” the researchers said.
According to the team, it’s also common to experience pain, swelling, redness or itchiness at the site of the injection, or swelling of the glands (lymph nodes) in the armpit.
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