my nephew has dengue fever says the doctors. he is hospitalised for 3 days and his platelets have come down from 136000 to 88000, 75000,63000,57000. but his cbc is normal range, his hb is 16 and pcv is 48. they are giving him antibiotics too. he is taking lots of fluid and urinating every 2 hours. is the treatment correct, why the platelet is coming down? is this dangerous?