As of Friday, all workers must have a green pass, a digital or paper certificate showing that the carrier has been vaccinated, tested negative for COVID-19 in the previous 48 hours or recovered from the virus.
Unvaccinated employees may enter the workplace but only if they undergo a swab every 48 hours, at their own expense, with a fixed cost of €15.
Those who go to work without the health certificate risk suspension without pay and fines of between €600 and €1500.
While the new law has prompted an increase in vaccinations, the download figures show the vast majority chose to take a test instead.
According to the latest official data from the government, out of the 1,049,384 green passes downloaded in Italy on Monday, 914,000 were generated from negative test results while 130,000 were a result of vaccinations.
Just over 81.4 per cent of Italy’s eligible population is fully vaccinated.
Up to three million people in Italy remain unvaccinated.
Some 23 million workers across the country will be affected by the new law.
Since mandate took effect on Friday, Italy has seen sporadic protests, notably in Trieste, where thousands tried to block access to its port.
