text: On May 15, he began to show symptoms of lethargy, fatigue, sore throat (not coughing), loss of taste and went to get samples for testing, the result was negative?
classes:  No, he tested negative on May 15, but on the next day, May 16, he tested again and the result was positive.  Also, he tested negative on May 15, but on the next day, May 16, he tested again and the result was positive.  Yes, he tested negative on May 15, but on the next day, May 16, he tested again and the result was positive.