Could registry of adverse reactions to vaccinations separate fear from fact?

A health care worker prepares syringes, including a vaccine for measles, mumps, and rubella (MMR), for a child's inoculations at the International Community Health Services Wednesday, Feb. 13, 2019, in Seattle. A recent measles outbreak has sickened more than 50 people in the Pacific Northwest, most in Washington state and, of those, most are concentrated in Clark County, just north of Portland, Oregon. (Elaine Thompson/AP Photo)

A health care worker prepares syringes, including a vaccine for measles, mumps, and rubella (MMR), for a child's inoculations at the International Community Health Services Wednesday, Feb. 13, 2019, in Seattle. A recent measles outbreak has sickened more than 50 people in the Pacific Northwest, most in Washington state and, of those, most are concentrated in Clark County, just north of Portland, Oregon. (Elaine Thompson/AP Photo)

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