Parents in East San Jose are being urged not to overreact to news a student in the Alum Rock school district has been diagnosed with scarlet fever.
Administrators at Adelante Dual Immersion Academy sent notes home to parents, informing them.
Scarlet fever is a contagious infection which was much more serious before antibiotics came into general use.
Experts say it's really just a strep throat -- unless a patient also develops a rash. That's when it becomes scarlet fever.
"At this point, we've seen no other cases at school,” Alum Rock Superintendent Stephen Fiss said. “We also went through the process of cleaning the classroom, disinfecting the classroom, the cafeteria, and restrooms
Not everyone who gets sick with strep throat will develop the rash.
Doctors say scarlet fever is only dangerous if left untreated.