I confirm that I will not participate in the activities if (a) I am in self-isolation, (b) I have a family member who is in self-isolation, (c) I stayed abroad 10 days before the activity (unless I have a negative PCR test not older than 48 hours), (d) I have had contact with a person infected with the SARS-COV-2 virus in the past 10 days, or (e) I have any of the following symptoms: fever, cough, shortness of breath, sore throat, runny nose, loss of smell