Three students at Damonte Ranch High and one student at McQueen High School were diagnosed with whooping cough. Early symptoms include a mild cough, runny nose, and low-grade fever. Over the course of one to two weeks, the cough many worsen and include vomiting or a “whooping” noise. With 19 teachers and 16 classified employees off work due to this situation, the District will be offering a free immunization clinic for all staff to receive Tdap immunizations from 1 p.m. to 5 p.m. today, and from 8 a.m. to 11 a.m. Saturday, and Sunday at the Brown Center, 14101 Old Virginia Road.