Tests showed the players were suffering from Norovirus, a viral form of gastroenteritis commonly known as Winter Vomiting Disease, which also induces diarrhoea.
Colin Perrins, head of Tower Hamlets Trading Standards and Environmental Health, said: "A thorough investigation into this incident was carried out. None of the results or findings indicated that food poisoning was the cause."
Dr Alex Mellanby, consultant in Communicable Disease Control at the North East and Central London Health Protection Unit, added: "The only positive finding in this investigation identifies Norovirus as the cause of the outbreak. We do not believe that this outbreak was caused by food poisoning from the hotel."
Despite the widely-publicised allegations, a spokeswoman for Marriott said the company would not be seeking damages or taking any legal action.
By Emily Manson