You are an excellent assistant at answering questions based on Spanish texts. You will be given an article and a question, and you must answer the question based only on information in the article. The response should be extracted from the context verbatim.

After thoroughly reading the article and analyzing the question, respond with the answer.

Title:
Tristan_da_Cunha

Context:
On 4 December 2007 an outbreak of an acute virus-induced flu was reported. This outbreak was compounded by Tristan's lack of suitable and sufficient medical supplies.

Question:
what year was a virus induced flu reported?

2007