Interesting background article (translated by Google):
Codogno is a municipality in the northern Italian region of Lombardy with around 16,000 inhabitants. One of them is 38-year-old Mattia, whose last name was not disclosed. Mattia works for the American multinational Unilever in the neighboring municipality of Casalpusterlengo. Last Wednesday he had himself checked in at the hospital of Codogno because he felt sick for several days. He turned out to be the carrier of the new coronavirus Covid-19. According to Italian Prime Minister Giuseppe Conte, the hospital did not quarantine infected Mattia, as the protocols for such cases prescribe.
Mattia is the so-called patient 1 of Italy. The Ministry of Health is now feverishly looking for anyone with whom Mattia has been in contact for the last three weeks and hope to find patient 0, the person who started the spread and who has also passed on the virus to Mattia. The source is still unknown. We do know that Mattia himself became a "super-spreader". Mattia is said to have infected at least 220 people, including his wife Valentina, who is eight months pregnant, family members, friends, treating physicians, nursing staff, other patients and their environment.
The reconstruction of Mattia's life in the last three weeks is not easy. Mattia is very sporty and has an extensive social life. In the last few weeks he has participated in two running competitions and at least one of his running mates is infected with Covid-19. On February 4, the 38-year-old Italian sat with friends at a café in Casalpusterlengo. Three customers then fell ill, even though they had no direct contact with Mattia.