Through the voluntary program that Baker's office has described as a "first-in-the-nation pooled testing initiative," participating schools conduct the screenings of staff and students whose parents have given consent at least once a week. As of March 29, the schools had tested almost 159,000 individuals in 22,679 pools, with a pool positivity rate of 0.76 percent, according to the administration. That same day, the statewide seven-day average positive test rate was 2.57 percent. "It's a very low percentage to come back positive, because keep in mind, if you're sick or you think you might hav...