Bacteria get a bad rap these days, what with the focus on germ-fighting antibacterial hand washes, gels, wipes and sprays that promise to squeaky-clean our lives. But what we might not realize is that these potent germ-fighters wipe out both good and bad bacteria, possibly contributing to an epidemic-worthy spike in childhood asthma and allergies as our kids’ fragile immune systems are no longer exposed to enough of the good bacteria that they need to develop normally.