I can't even remember which friend it was, but someone passed down their used copy of Dr. Harvey Karp's The Happiest Baby on the Block DVD shortly before my first baby was born. It's ridiculous that I can't recall who gave it to me, as I would love to thank them five million times over for the relief that was provided when I followed Karp's 5 S's: swaddling, side/stomach position, shushing, swinging, and sucking. My gal would chill out and, indeed, be the happiest baby on the block (see pic).
So it's not surprising, to me anyway, that Pediatrics has come out with a study showing that Karp's methods are scientifically proven to soothe babies who have just received a vaccination. Those are crying babies who just got jabbed. So not an easy crowd.