- A national emergency was declared by Italy on January 31 following the outbreak of Covid-19.
- Atalanta played Valencia in the UCL last-16 tie at the San Siro on February 19.
- It is suspected that a large section of the 40,000 fans on the night were suffering from the illness.
- Bergamo mayor Giorgio Gori feels that the match turned out to be 'a biological bomb'.
Giorgio Gori is quoted by Marca as saying: "The match was a biological bomb. At that time we did not know what was happening.
"If the virus was already circulating, the forty thousand fans who went to San Siro were infected. No one knew that the virus was already circulating among us.
'Many watched the game in groups and there were lots of contact [between fans] that night. The virus passed from one person to another."
There were over 44,000 spectators at San Siro on February 19, with people travelling to Milan from all over Italy and Spain to watch the Champions League Round-of-16 clash.
The two countries have suffered the most from the coronavirus among European states, with Italy registering 69,176 cases and 6,820 fatalities as of Wednesday. Spain's numbers stand at 47,610 infected and 3,434 deceased.