Lynne Peeples Everly Macario recalls the “primal shriek” her son released one fateful April morning in 2004. By the end of the day, Simon Sparrow, who had not yet turned 2, would succumb to an increasingly common infection called methicillin-resistant Staphylococcus aureus (MRSA). “This bacteria is so virulent, it took my son within literally hours,” [...]