Which free nation has this rule ?
Which other nation doesn't have universal healthcare? You want to be like everybody else or you want to have 'freedom'?
The UK mandated small pox vaccine in 1853 and 47 US states required it for entry to Public School. France & Greece already mandated Covid vaccine for certain classes of people, and there are other vaccines with are complulary in
In Italy, in 2017 vaccination against diphtheria, tetanus, pertussis, hepatitis B, poliovirus, Haemophilus influenzae type b, measles, mumps, rubella and varicella became compulsory in childhood.
There are 11 European countries with mandatory vaccines
http://www.asset-scienceinsociety.eu/reports/page1.html.
This wasn't controversial until one side of the political map found it to difficult to accept and reality and consistently tries pretending every aspect of the pandemic isn't real.