The researchers found that happiness really is contagious.

VOA: special.2009.01.21

Indeed,Dr.Strebel says measles, one of the most contagious diseases, is making a rapid comeback.

VOA: standard.2010.05.21

He indicated that other contagious or infectious diseases were also kept in check.

VOA: standard.2009.11.29

More than 200 people in Australia have now contracted the contagious condition.

VOA: standard.2009.05.30