https://www.reuters.com/article/us-h...-idUSKBN2AK07H

Russia just registered third vaccine - CoviVac. It is "old fashioned" vaccine from inactivated virion without possibility to replicate. Developer - Chumakov institute, known by its polio vaccine.

Large scale trial lasts from September'20.

CoviVac will induce shorter lasting immunity against COVID than Sputnik or Moderna or Oxford. The main advantages of that vaccines are: it should be softer after injection and may be used for 80+ patients, and, most important - it may be injected as many times as need and will work fine every time and each time will boost immunity. It is possible "to renew" immunity every 6 months (for example) and add immunity against new variations.