DON’T WORRY: This won’t hurt a bit. “A nurse wielding a hypodermic needle is unlikely to conjure up calm thoughts, let alone inspire you to go solo and administer the injection yourself. But a new patch lined with short needles, each the width of just a few strands of hair, may soon grant squeamish patients a reprieve as well as a relatively simple opportunity to take matters into their own hands. The innovation could eliminate the pain and fear of getting shots, researchers say, and it could also make future vaccines and medical treatments safer, more effective and easier to self-administer.”