United States health officials confirm none of the flu vaccine quarantined in Britain last week is safe for Americans to use.
More testing ended the last hopes that at least some of the shots could be salvaged. In the meantime, some states are cracking down on flu shot providers. Doctors and nurses in some states face fines and even prison time if they give flu shots to people who aren't in high risk categories.
Wrongdoers in Wisconsin could face up to 30 days in prison.
In states that aren't threatening legal action, officials are still asking healthy people to forgo their shots this year.