75 students and their families were forced to quarantine over the Thanksgiving break after one student’s family knowingly sent their infected child and their sibling to school after the child tested positive for COVID-19.

The incident occurred at Neil Cummins Elementary School in Corte Madera, California.

According to superintendent of Larkspur-Corte Madera School District, Dr. Brett Geithman, the child’s parents continued to send the child to school for seven days even though they knew the child was ill.

Dr. Geithman says the school was notified after the seven days, by the health department about the child’s illness and that’s when the school noticed that the child had still been attending class.

“In this case both the school and public health were given inaccurate information by the parents, which led to a prolonged interval of exposure,” Dr. Matt Willis, Marin County’s public health officer, told CNN.

According to public health officials, the child tested positive on the 9th of November but refused to provide the name of the school the child attended.

Officials continued to contact the family several times and was eventually given the school’s name on the 19th.

“This is not only a violation of basic ethics, it’s a violation of law.” Willis told CNN. “Violation can lead to a fine or criminal prosecution as a misdemeanor. Because of the seriousness of this violation we’ve referred the case to the District Attorney.”

75 students were then forced to begin quarantining on November 19th, which ran into the Thanksgiving holiday.

Three students were sent into a modified quarantine, after tests revealed they came down with the virus through school based transmission.