The 1510 flu disrupted royal courts, church services, and social life across Europe. Contemporary chroniclers and those who've read their accounts observed how entire populations were attacked at once,[1][2] which is how the disease first received the name influenza (from the belief that such outbreaks were caused by influences like stars or cold).[10] Turin professor Francisco Vallerioli (aka Valleriola) writes that the 1510 flu featured "Constriction of breathing, and beginning with a hoarseness of voice and... shivering. Not long after that there being a cooked humor which fills the lungs."[1] Physicians like Valleriola described the 1510 flu as more fatal to children[20] and those who were bled.[17] Lawyer Francesco Muralto noted that "the disease killed 10 people out of a thousand in one day," supporting a fatality rate of around 1%.[1]