Dr. Jason A Yahwak M.D.

Sputum is a combination of mucus coughed up from the respiratory tract and saliva. It is usually a result of diseases or infections. Phlegm and sputum are often interchangeably used. Sometimes, the term mucus is used when referring to sputum or phlegm. However, mucus is also produced in the...

Bronchitis is an inflammation of the bronchi, usually resulting from a viral infection. Bronchitis can be either acute or chronic. Allergic bronchitis is also common among people who have allergies. Bronchitis is more common during the winter season when common cold and flu infect people in the...

The great thing about medical research is that there are always new clinical trials going on in an attempt to find a cure, or at least new treatment options. However, it can be confusing to understand what actually goes on in these trials, and how they come about in the first place. Read further to...

Asthma is considered a common lung disorder in which inflammation causes the bronchi to swell and narrow the airways. Asthma is indiscriminant of any age group. It is a long term disease that has no cure but can be controlled by following the right dosage of medication, prescribed by a doctor or...

Pneumonia is a lung infection that affects the air sacs. The sacs are either filled with fluid or pus causing a cough with phlegm. The symptoms of pneumonia range from mild to severe, which could be life-threatening. People from all age groups, from infants to old age, people with other health...

Pneumonia as a disease was once dreaded, since most of the cases would turn out to be fatal. This was many years ago, and with medical advances, times have changed. However, in some severe cases of pneumonia, especially in people with weakened immune systems, the disease can still be fatal. If the...