Ten pages in: hell yeah, American Girl takes on anti-vaxxers, woo~ As the end of the book notes, polio has been eradicated in the United States since 1980, so it's fitting to place the historical discovery of a vaccine and efforts to get every child vaccinated in the series to remind people why don't have children in iron lungs any more.

Maryellen's family also goes on a crosscountry trip to Yellowstone National Park and plans her 18 year old sister Joan's wedding. The Looking Back section does note that these adventures are very much more of what an upper-middle class white family would've encountered in the 1950s, and has a couple paragraphs on segregation. I do feel like it could've been a more interesting story had we had a character encounter that? Maryellen gets to deal with the boys club and the space race in trying to build a flying machine, though. ( )