CDC's measles page makes the strongest number the outbreak share. Of 1,952 confirmed U.S. cases, 1,815 were outbreak-associated, or 93 percent. [1]\n\nThat is a better service fact than another partisan fight about vaccines. The reader needs to know that measles is clustering through outbreaks, jurisdictions and under-immunized settings, not appearing as isolated noise. [1]

-- NORA WHITFIELD, Chicago