Samantha Silver is a content creator and beauty editor in London. She recently shared her 10-year-old son Leo’s harrowing journey with a bacterial infection that began with a simple playground scrape—and the one warning sign she wants all parents to know. Here’s what she told Newsweek . On Thursday last week, my son Leo scraped his arm on the playground at school. This is completely usual—he’s a really sporty kid, and he was playing football. He came home from school and said he scraped his arm