How effective are the vector vaccines?
In the study for approval, Johnson & Johnson's vector vaccine (Ad26.COV2.S; COVID-19 Vaccine Janssen) showed an efficacy of approximately 65 percent and high protection against severe course of disease, after a single dose of vaccine.
However, according to current knowledge, a single dose of Johnson & Johnson's vaccine does not provide sufficient protection against the Omicron variant, which is currently dominant in Switzerland. It is therefore recommended to supplement the basic immunization with an mRNA vaccine. For the booster vaccination, an mRNA vaccine is also recommended. In certain cases, booster vaccination is also possible with the Johnson & Johnson vector vaccine.
How long the protection of the booster vaccination lasts is still unclear and is being continuously investigated.
Information on the recommendation with the Johnson & Johnson vaccine can be found here on the website of the Federal Office of Public Health (in German, French and Italian only).
- How do vector vaccines work?
- Which vector vaccines are already approved or under development in Switzerland?
- Have vector vaccines already been used against other diseases?
- What are the most common side effects associated with vector vaccines?
- Does the vector vaccine affect our DNA?
- How effective are the vector vaccines?