the pinworms will not cause problems with her chemotherapy but no one really wants to get pinworms so those cousins need to be treated first. you don't want them either! pinworms are medically harmless but they are very annoying and should be eliminated.
are pinworms dangerous for children having chemotherapy? . my 2 year old granddaughter is being treated with chemotherapy for rhabdomyosarcoma. is there any added risk for her if she is around a cousin with pinworms?