IVP head Dace Zavadska explained that vaccination with Janssen, which consists of a single dose, offers lower protection against the delta variant of the Covid-19 virus and would be more likely to lead to symptomatic Covid-19 and the need to hospitalize than the two-dose cycle by other manufacturer vaccines.
Therefore, IVP recommends getting a booster shot of either the Pfizer or Moderna vaccine 8 to 12 weeks after the first shot, regardless of age. The same Janssen vaccine is also acceptable as the booster.
For those who have recovered from Covid-19 and also got a Janssen vaccine, no booster is needed.
The second vaccine after Janssen is not mandatory but is recommended to provide better protection against the illness.