Under the new law, children must now receive a range of mandatory vaccinations before attending school.
The law is part of Italy's drive to increase vaccination rates to be in line with the World Health Organisation's target of 95% - enough to prevent diseases spreading while allowing children whose immune systems are too compromised for vaccinating to go without.
For years, confusion about vaccines has reigned in Italy. These vaccines include polio, measles, mumps, rubella and chickenpox.
In Bologna, the local authority has sent letters of suspension to the parents of some 300 children, and a total of 5,000 children do not have their vaccine documentation up to date.
"Italy's measles vaccine coverage was par with Namibia, lower than Ghana", San Raffaele University microbiology and virology professor Roberto Burioni told CNN previous year.
The government, which had initially opposed the Lorenzin law, reversed that position after what it called "a measles emergency", and criticism from health experts accusing the anti-vaccination movement of "sending Italy back to the Middle Ages".
According to the Times, the current Italian government is working on a confusing plan to introduce "flexible obligation", in which immunization would only be mandatory if rates dipped below herd immunity levels. At present, this target is not being achieved (it is now around 80 percent), said health officials.
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