(Portland, OR) -- Parents have until February 15th to get their children up-to-date on immunizations in Oregon, or they'll be excluded from school. This includes students in public and private schools, preschools, Head Start and certified child care facilities. The Oregon Health Authority says it's the best way to prevent diseases such as whooping cough and measles. Parents who can't afford immunizations should contact their county's health department. COVID-19 vaccinations are not required, but OHA strongly recommends them.