Which of the Following Diseases Is Most Likely Causing the Patient’s Symptoms

a Patient Presents with Sudden Onset Fever, Severe Headache and Body Aches. Physical Examination Reveals Petechiae and Ecchymoses on the Skin. Laboratory Tests Show Thrombocytopenia (Platelet Count <100,000/μl) and Elevated Liver Enzymes (AST and ALT)