Dr. David H Wu M.D.

What are cold sores?Cold sores or fever blisters are a very common perioral condition caused by the herpes simplex virus (HSV). There are two types of herpes simplex virus. Type 1 usually causes cold sores, although in some cases, the cold sores can also be caused by type 2. It is usually...

The mumps is a highly contagious airborne viral infection, which manifests in a specific shape of the face and neck. The causing agent is the virus of mumps (paramyxovirus). Timely vaccination (MMR) is the best way to prevent complications that arise in 95% of cases. The mumps virus can be...

In America alone, we have 645,621 confirmed cases of coronavirus and 52,736 of them have recovered. More and more countries are also reporting improvements when it comes to their statistics. We are slowly flattening the curve. The attempts to address this pandemic are working. The effects of...

With over 2,118,790 people in the world having the COVID-19 virus, more than 535,270 cases have recovered. That means 25% of the confirmed cases. We can consider these statistics on a positive note, individuals infected with the virus can heal.But how? There are different ways on how to manage a...

The hepatitis virus is one of the liver’s greatest enemies. It causes infections that can severely malfunction the liver, resulting in various conditions like scarring of the liver, liver failure, or even liver cancer. The hepatitis viruses have three types, namely, A, B, and C. While all three...

The main difference between AIDS and HIV is that HIV is a virus whereas AIDS is a condition that is caused by HIV. People often confuse HIV and AIDS. Different diagnoses are used to identify both HIV and AIDS. However, they are said to go hand-in-hand and are very often used interchangeably to...