<s>[INST] Hi, my brother has dengue and his platelets count went on 93K when he was admitted. Next day count raised to 1.6K but now it has come to 43K on third day. Do I have to worry as he is hospitalised and seems doctors are not taking it serious. Please advice. [/INST] Hi, Sorry to hear about your brother and also appreciate your concern. The number of platelet count in dengue is of prognostic value;it means that it tells us how the disease is progressing and if platelet count has come down to 43K from 1.6K in one day, it should be followed up keenly although in my opinion a retest is a must. If it goes down further, he may need platelet infusion. Please talk to the doctor and keep an eye over the platelet count and the overall condition of your brother. I hope this answers your question. Please feel free to ask another question if there is another query. Thanks, Chat Doctor.  </s>