ROME—Italy may eventually make COVID-19 inoculations compulsory for everyone of eligible age, and plans to start administering booster vaccine shots later this month to vulnerable people, Prime Minister Mario Draghi said on Thursday. The government has already made it mandatory for medical workers to get vaccinated if they want to be paid, but Draghi said everyone may be obliged to get a shot when EU health authorities give full approval to the vaccines. The European Medicines Agency (EMA) has given conditional approval to four vaccines. This could be upgraded to so-called standard marketing authorisation after further checks, at which point, Draghi said, they could become compulsory for all. Such a move would likely spark fierce opposition in a country that has seen a rise in scepticism about all kinds of vaccines over the past decade and where health experts who have promoted inoculations have faced verbal abuse and threats from …