A school-age child is being treated for diphtheria, Berlin health authorities said on Tuesday, confirming media reports in the German capital. According to the reports, the child is a 10-year-old boy, who is a pupil at a Waldorf school. He was initially treated for acute tonsillitis in a hospital in Brandenburg, the state that surrounds Berlin. The hospital reported a suspected case of respiratory diphtheria in an unvaccinated child on September 27. Laboratory tests confirmed the disease, which can be life-threatening but is rare as a result of widespread vaccination. The boy has been transfer…