The web portal answers important questions about the Covid-19 vaccines. It puts together the latest information on the effect, functioning, development and approval of the vaccines.

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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).