Section 906 - Existence of communicable diseases; return after illness1. Whenever, upon investigation and evaluation by the director of school health services or other health professionals acting upon direction or referral of such director for care and treatment, a student in the public schools shows symptoms of any communicable or infectious disease reportable under the public health law that imposes a significant risk of infection of others in the school, he or she shall be excluded from the school and sent home immediately, in a safe and proper conveyance. The director of school health services shall immediately notify a local public health agency of any disease reportable under the public health law.2. Following absence on account of illness or from unknown cause, the director of school health services may examine each student returning to a school without a certificate from a local public health officer, a duly licensed physician, physician assistant, or nurse practitioner.3. The director of school health services, or other health professionals acting upon direction or referral of such director, may make such evaluations of teachers and any other school employees, school buildings and premises as, in their discretion, they may deem necessary to protect the health of the students and staff.