MARINA VILLENEUVE and OLGA R. RODRIGUEZ
Associated Press
Alarming clusters of the coronavirus swelled on both coasts of the U.S. on Tuesday, with 70 cases now tied to a biotech conference in Boston and infections turning up at 10 nursing homes in the hard-hit Seattle area.
Presidential candidates Bernie Sanders and Joe Biden abruptly canceled rallies because of worries about the virus, and New York's governor announced he is sending the National Guard to scrub public places and deliver food in a New York City suburb that is at the center of the nation's biggest known cluster of infections.
Massachusetts Gov. Charlie Baker declared a state of emergency as cases statewide jumped by 51 from the day before, to 92. Of that number, 70 are now connected to a meeting held last month by biotech
