Austria is embarking on a dramatic public health experiment from Tuesday, with a controversial new law that makes Covid-19 vaccines mandatory for everyone. Multiple European countries have stigmatized people who refuse a vaccine, but Chancellor Karl Nehammer’s government is going further and will start criminalizing holdouts. Police will begin checking the vaccination status of people on the street and during traffic stops. Beginning in mid-March, offenders who haven’t had a shot will face fines rising to as much as 3,600 euros ($4,050). The law, which received a record number of public comments before being passed, runs through 2024 and has catalyzed a broad sweep of protesters.