hearing a lot of talk this fall about how to stay healthy, which leads him to ask lots of questions. In this new special episode from the Emmy®-nominated series, Sid and his friends learn the basic science behind germs, viruses and why their parents chose for them to get vaccinations using age-appropriate vocabulary and scientific concepts that have become a hallmark of the series. Visit pbskids.org for more information. ... "sid the science kid" vaccination healthy science scientist germs ...