I am looking for expert advice on the health of my younger brother (who lives in gurgaon, currently at home quarantine). He is 25 years old (blood group b ve) and got a headache with a low grade fever on the evening of 24th july and high fever on 25th july and till now every day in the morning and night he got high fever (102-104). He is on medication (please find attached the medication and spo2, temperature daily test in excel sheet) and a constant observation with our family doctor (mbbs, md). He didn't feel any kind of difficulty in breathing and pain in the leg muscles below the knee and/or other symptoms of cavity-19 like loss of taste and smell except headache in early days but feeling lethargic mostly. He is in-home quarantine and no one in the family has any symptoms. But most importantly, he has crp value 11.8 mg/l (on 29 july) and 106 mg/l (on 31 july) and d-dimer value around 1.38 mg/l (on 29 july) and 6.33 mg/l (on 31 july, 5.18 (on 1 august) in a test recently conducted (please also find attached the test reports and other liver and blood reports). His sgpt (199. 2iu/l) and sgot (90. 6iu/l) and ggt (326 iu/l) are high. According to his d dimer report, the doctor advised him to take clexane 60 mg for 5 days, he already had two injection on 1st and 2nd august (by a compounder from a nearby hospital). We got cavity negative test result and a positive typhi igm test on 3rd august. But he did not have any symptoms of loose motion. I have few queries: 1.Is this due to covid as test may be negative after 9-10 days or the specificity of test is not accurate. 2.And crp, esr, d dimer are raised. Is these parameter also raised in typhoid? 3.Is due to typhoid as typhoid test is positive but he did not have any loose motion symptoms he just get it one time after taking azee500 od with other medicines like cepodem bd or we need to confirm it with culture test. Is yes which culture test? 4.Do we need to continue clexane as d dimer is high? 5.Can we stop omnacortil suddenly or we need to taper it down?