Article History
Received: 9 October 2021
Accepted: 21 April 2022
First Online: 25 May 2022
Competing interests
: M.F.B. and M.O.M. own shares and/or receive salaries of Saiba GmbH which is involved in the development of a vaccine against COVID-19. D.E.S. declares no Competing Financial or Non-Financial Interests.