PRAC is continuing its assessment of the reported cases. In this context, EMA is convening an ad hoc expert group on 29 March to provide additional input into the assessment. External experts in haematology (thrombosis and haemostasis), cardiovascular medicine, infectious diseases, virology, neurology, immunology and epidemiology will meet to provide their views to PRAC on aspects such as any plausible mechanism of action, possible underlying risk factors and any additional data needed to gain a deeper understanding of the observed events and the potential risk. This expert group will also include two representatives from the public.