Her immune system is getting plenty of work. She’s just not getting the viruses that are really good at evading the immune system. What doesn’t kill you does no

Her immune system is getting plenty of work. She’s just not getting the viruses that are really good at evading the immune system. What doesn’t kill you does not necessarily make you stronger. She’ll get them when she’s a little older and her immune system is a little stronger and she’ll be fine.