Nearly 94,000 child COVID-19 cases were reported in a single week, according to the American Academy of Pediatrics.The Delta variant is more than twice as contagious as previous variantsTrusted Source, and there’s data that suggests it might cause more severe illness. Yale Medicine reported that cough and loss of smell are less common with the Delta variant, while headache, sore throat, runny nose, and fever are among the top symptoms.