The headline of this submission is possibly the most irresponsible statement I have seen in a fortnight.<p>The linked article says "Some 10,000 visitors to California's Yosemite National Park <i>could have been exposed</i> to a deadly virus that kills one in three victims and cannot be treated" (Emphasis added.)<p>I wish people would resist the temptation to change the meaning of the stories they link to, by making up headlines that journalists wouldn't dream of writing.<p>There is no actual rule like this, but there ought to be -- don't rewrite the article's headline, <i>copy it</i>.