Some infections caused by viruses, known as viral hemorrhagic fevers, can cause changes in consciousness as well as show signs of petechiae. These diseases include dengue, yellow fever ...

Some patients show petechiae, bruising or thrombocytopenia. The clinical presentation of acute dengue infection is non-specific but 5–10% of patients progress to severe DHF/DSS, which can result ...

Antibody (Ab)-dependent enhancement of infection occurs when preexisting antibodies present in the body from a primary (first) dengue virus (DENV) infection bind to an infecting DENV particle ...