I fully agree about credentialed sources of information.  How about the FDA?
https://www.fda.gov/media/143557/download
Vaccines and Related Biological Products Advisory Committee October 22, 2020 Meeting Presentation Individuals using assistive technology may not be able to fully access the information contained in this file. For assistance, please send an e-mail to: 
ocod@fda.hhs.gov and include 508 Accommodation and the title of the document in the subject line of your email.
FDA Safety Surveillance of COVID-19 Vaccines : DRAFT Working list of possible adverse event outcomes ***Subject to change***
 Guillain-Barré syndrome
 Acute disseminated encephalomyelitis
 Transverse myelitis
 Encephalitis/myelitis/encephalomyelitis/ meningoencephalitis/meningitis/ encepholapathy
 Convulsions/seizures
 Stroke
 Narcolepsy and cataplexy
 Anaphylaxis
 Acute myocardial infarction
 Myocarditis/pericarditis
 Autoimmune disease
 Deaths
 Pregnancy and birth outcomes
 Other acute demyelinating diseases
 Non-anaphylactic allergic reactions
 Thrombocytopenia
 Disseminated intravascular coagulation
 Venous thromboembolism
 Arthritis and arthralgia/joint pain
 Kawasaki disease
 Multisystem Inflammatory Syndrome in Children
 Vaccine enhanced disease