Welcome back.We have an indoor smoking ban here in Minnesota...Now there's a new report out on the effectiveness of such bans...Michelle Gielan has that story and more in today's health watch report.A new study might make you skip acetaminophen after getting the flu shot.Research suggests giving babies acetaminophen to prevent fever when they get childhood vaccinations may backfire and make the shots a little less effective. Although the effect was small -- and most kids still got enough protection from the vaccines , doctors say the results make a compelling case against routinely giving acetaminophen right after vaccinations.Indoor smoking bans seem to be working. A new report indicated the bans are effective at lowering the risk of heart attack, even among non-smokers by reducing exposure to secondhand smoke. The report gives the most definitive evidence to date -- that laws banning smoking in public places can reduce cardiovascular related health problems.Fish rich in Omega-3 fatty acids may be good for you.. But a new study suggests, it seems to offer little protection against heart failure. But researchers say the new findings don't change the general recommendation that adults aim to eat fish at least two times a week.Those are some of today's top health stories. I'm Michelle Gielan, CBS News, New York.