Just reading a little further. You talk about adverse events, but the link I posted earlier refers to Adverse Drug Reactions (ADR). It seems that the language is specific and important. I read this from a BMJ article...
What is an adverse drug reaction?
Medicines have unintended side effects, and if any of these is harmful, the patient has an adverse drug reaction.2 The European Medicines Agency (EMA) defines an adverse drug reaction as “a response to a medicinal product which is noxious and unintended.”3
...then this from pharmacologyeducation.org....
- An adverse drug reaction (ADR) is an unwanted or harmful reaction experienced following the administration of a drug or combination of drugs under normal conditions of use and is suspected to be related to the drug. An ADR will usually require the drug to be discontinued or the dose reduced.
Noxious, unintended, unwanted and harmful... will require the stud to be discontinued or dose reduced. Given that they are expecting a high volume of ADR’s, this sounds a little worrying and seems quite definitely linked to the medicine received rather than coincidental sickness.
I’m not intending to take any vaccine, as I wouldn’t for flu, but I know my old man will and I want him to consider all information, which is difficult when his world view is based on the bbc.