The 1510 coqueluche has been recognized as influenza by modern epidemiologists[1][2] and medical historians.[3][44] Suggestions that the 1510 coqueluche was whooping cough have been doubted[45] because adult sufferers often experienced "precipitous"[1] symptoms described by contemporaries like Tommasino de Bianchi[1] or Valleriola as high fever for 3 days, headache, prostration, loss of sleep and appetite, delirium,[6] a cough most severe on the 5th to 10th days,[15][46] lung congestion,[1] and slow recovery beginning on the second week.[9][10] Adults with pertussis will usually cough for weeks before becoming gradually more ill then recovering over a period of months.[47][48] The coqueluche of 1510 is considered to be influenza by experts because of its sudden symptoms, explosive spread,[13] and timelines of sickness to recovery. The first outbreak of whooping cough to be agreed on by most medical historians is Guillaume de Baillou's description of an outbreak in Paris in 1578.[45]