Yes it's possible. Do check with your credit card company to see if they would need advance notification of a foreign charge to the card. They tend to decline foreign charges as those are often related to cc number theft, but if they know to expect it and in what country, they put up a flag to have it go through (based on cc user experience, from the US).

Then, reading further through your questions - that graph came out of a Danish study from March:

onlinelibrary.wiley.com…

(edit, adding:) ...titled "Batch-dependent safety of the BNT162b2 mRNA COVID-19 vaccine" by Max Schmeling, Vibeke Manniche, Peter Riis Hansen