Complex sentence: According to the information and data collected it was confirmed that many of the human cases of H7N9 appeared to have a link with live bird markets, but to that date no human cases or animal infections of H7N9 had been detected on poultry farms.
Split into simpler sentences: According to the information and data collected it was confirmed that many of the human cases of H7N9 appear to have a link with live bird markets. To date no human cases or animal infections of H7N9 have been detected on poultry farms.