evidence: Myocarditis and/or pericarditis following vaccination with mRNA and other COVID-19 vaccines [...] Very rare cases of Bell's palsy (typically temporary weakness or paralysis on one side of the face) have been reported following vaccination with mRNA COVID-19 vaccines (Pfizer-BioNTech Comirnaty original or Moderna Spikevax original) among individuals aged 12 years and older. The Pfizer-BioNTech Comirnaty and Moderna Spikevax product monographs list Bell's palsy as a possible adverse effect. However, available evidence is not currently sufficient to support a causal relationship between the mRNA vaccines and Bell's palsy. Symptoms of Bell's palsy appear suddenly and generally start to improve after a few weeks. The exact cause of Bell's palsy is unknown. It's believed to be the result of swelling and inflammation of the nerve that controls muscles on the face. [...] Multisystem inflammatory syndrome in children or in adults (MIS-C or MIS-A) following vaccination with an mRNA COVID-19 vaccine