5 ms·

My understanding is that the likelihood of adverse vaccine side-effects is greater after a previous COVID infection than in a "naive" immune system. This study

• _s 5y ago
  Adverse sounds serious, but really: About 105 vaccine recipients reported at least one AEFI symptoms following COVID-19 vaccination (incidence proportion 6.4%, 95% CI: 5.3%, 7.7%). All AEFI reported were minor which were managed by tablet paracetamol and subsided after 1–2 days. Fever (65, 3.98%) was the most commonly reported AEFI followed by myalgia (54, 3.30%) (Fig. 1). About 48 (2.94%) study participants reported 2 or more AEFI, most common being fever with myalgia (19, 1.16%) and fever with headache (18, 1.10%). No severe or serious AEFI was reported among vaccine recipients.
  • saurik 5y ago
    I think adverse just means "not good" as one could also see neutral or even positive effects; one would say severe or serious (as in the text you quoted) as strength modifiers if applicable, but the word "adverse" shouldn't inherently make something sound strong or ever feel synonymous with "serious".
• mateo1 5y ago
  It makes sense as the secondary immune reaction (ie after a second infection or vaccination) is generally much larger than the first.