Covid 19 vaccines in Switzerland. Are they experimenting on the older people?

With the third dose of vaccination for old people in nursing homes, this could encourage serious outbreaks and deaths. Experts do not agree on the point in time at which the vaccination protection is weakened to such an extent that a refresher is necessary. For very old people with a weaker immune system and the greatest risk of severe to fatal Covid-19, however, it is very questionable whether final certainty is needed