The authors randomly chose 319 Harvard undergraduates, who then named 425 of their friends. The researchers checked on the health of these 744 students between 1 September 2009, and 31 December 2009 using two different methods: a twice-weekly e-mail survey that asked the students if they had any flu symptoms and the students' records at the campus health clinic. Christakis and Fowler report online today in PLoS ONE that students in the friend group showed signs of the flu between 14 and 69 days before the epidemic peaked in the control group of randomly selected undergraduates.在之前流感非常盛行時, 由於指導教授在學校裡身居要職, 不才被抓去幫忙寫程式分析, 看看是否能夠從學校的資料中, 看出流感傳染的趨勢, 以此決定是否要停課. 不過因為只能用選課資料和學生請假的回報資料來分析, 其實看不出個什麼.
唯一的結論大概是, 修同一門課對流感傳播不是很有影響力 XD
其實這也不意外, 科科. 如果能夠弄到 Facebook 的帳號, 可能還可以分析出個什麼端倪.
Ref.: Christakis NA, Fowler JH, 2010 Social Network Sensors for Early Detection of Contagious Outbreaks. PLoS ONE 5(9): e12948. doi:10.1371/journal.pone.0012948
沒有留言:
張貼留言