platelets

my 2 year old grandson has lost his hair and his Platelets have dropped they are running blood test to try and find out what is wrong. He has been under going test for almost a year and they can't find anything

Please pray for my sister's child who was supposed to finish her law degree two years ago unfortunately got sick.She was in and out of hospital till she became blind due to platelets. We need her to recevery of her sight and sicknesses and diseases to leave her in Jesus name.