The Interterritorial Council of the National Health System (CISNS, in its acronym in Spanish), addressed in a meeting held on Wednesday the administration of a booster dose of a Covid-19 vaccine to people vaccinated with the Janssen vaccine (also known as Johnson and Johnson).
On Tuesday, the Public Health Commission unanimously decided to recommend the administration of a booster dose to those vaccinated with Janssen.
The Ministry of Health recalls that the Janssen vaccine is less effective than messenger RNA (mRNA) vaccines.
Therefore, in order to "complete the protection of these people," the Ministry of Health recommends administering a booster dose with mRNA vaccine starting 3 months after the initial dose.
In other words, the second injection will be with the Pfizer/BioNTech or Moderna vaccines, the two drugs that have shown the best efficacy.
The governments of the Spanish regions will start to provide this booster dose from 15 November, following the order of prioritization established in the Spanish vaccination strategy against Covid-19.