School officials said hand, foot and mouth disease is spreading among students in Waterbury and Hartford.
A few students at Noah Webster MicroSociety School were reported to be diagnosed with Coxsackie virus, according to Hartford school officials.
Hartford Communications Director Pedro Zayas said five cases were confirmed at Noah Webster.
He said they are sending home health advisories with tips on preventing the virus's spread.
Waterbury School officials confirmed to Eyewitness News on Friday that the Coxsackie virus was found in seven students across three city schools.
Five cases were confirmed at the Rotella Magnet Elementary School. One case was found at Crosby High School. The last student was at Sprague Elementary School.
Officials said no events have been canceled and no schools have been closed.
They said the affected schools were cleansed after children were dismissed.
They sent a letter home to parents with the state's guideline information.
Hand, foot and mouth disease was confirmed in two other school districts earlier this month.
Several students at Derby High School contracted it.
Watertown school officials said they also battled an outbreak.
The infection causes a blister-like rash and is spread by coughing, sneezing or coming into contact with a contaminated patient. Health officials said it can also spread by touching a contaminated surface.
Officials in both Waterbury and Hartford have urged students to constantly wash their hands.
Students must have a doctor's note before returning to school.
They are urged to stay home until they are fever free for 24 hours.
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