evidence: In children weighing 15 kg (33 lb) to less than 30 kg (66 lb), the first dose is two 300-mg injections given at one time. Then, they would receive one 300-mg injection once every 4 weeks. [...] In children weighing 15 kg (33 lb) to less than 30 kg (66 lb), the recommended dosage is a 300-mg injection once every 4 weeks.