六级练习2016.04.09 likely, annual, relative, research, University

Rebecca949

Getting a flu shot can help prevent influenza. But now, a large study in Britain indicates that older adults who get an annual flu vaccination are less likely to suffer a heart attack. (1)_________________________________, age 40 and older. Researcher Niroshan Siriwardena of Britain's University of Lincoln led the study.
"Our research suggests that flu shots are associated with a reduction in relative risk of heart attack in adults by about 19%." (2)_________________________________. The results were mathematically adjusted to reflect the fact that (3)_________________________________ are more likely to get a flu shot.

本帖隐藏的内容需要回复才可以浏览

oralex

The study involved more than 78000 people
The reduction was even higher 21% for people who got vastination earlier in the flu season
people are higher risk of heart attack in the first place