evidence: The most commonly reported adverse events with COVID-19 vaccines are expected vaccine side effects, such as headache, fatigue, muscle and joint pain, fever and chills and pain at the site of injection. The occurrence of these adverse events is consistent with what is already known about the vaccines from clinical trials. [...] A: Short term reactions, such as soreness at the injection site, fatigue or headache are common following any vaccination with COVID-19 vaccines. These reactions usually pass in a day or two. If new evidence becomes available that suggests a specific serious adverse event may be linked to a particular COVID-19 vaccine, then regulators will take action by working collaboratively on a global basis and liaise with public health authorities. The type of actions that can be taken depend on the nature of the adverse event, and could range from issuing safety warnings for patients, healthcare professionals and the community; updating the product information or consumer information for the vaccine to show contraindications for the use in particular patients (e.g. those with certain co-morbidities); to closely monitoring adverse events in certain groups of patients; preventing the release of a particular batch of vaccine through to temporary suspension of the use of the vaccine until more is known.