Dear all,

I've been informed that one participant of the last seminar did test positively on covid (antigen test today).

So I am letting you know. The person was vaccinated as I suppose are most of you, so there should be very little danger, and according to the official regulations this would not count as a risky contact anyway (> 2 m distance), see https://covid.gov.cz/en/situations/infection-and-general-measures/i-was-identified-risky-contact

However, if you want to be extra careful, perhaps before visiting a vulnerable relative, I understand the best time to try a PCR test is 5-7 days after a contact.

Stay safe,

R