H7N9 bird flu cases spike in China ahead of Chinese New Year . In January alone , 19 deaths and 96 humans have been infected , CNN says . Expert urges tougher bio-security measures in H7N9 's live poultry markets . `` Sometimes we just do n't know the source , '' said the WHO 's Hartl . China has pneumonia-like symptoms , family of patients tell Xinhua .
H7N9 bird flu cases spike in China ahead of Chinese New Year . In January alone , 19 deaths and 96 humans have been infected , CNN says . Expert urges tougher bio-security measures in H7N9 's live poultry markets . China has pneumonia-like symptoms , family of patients tell Xinhua .