Each subunit contains an iron containing pigment (heme) and a protein (globulin). There are two types of subunits, alpha and beta. Each gram of hemoglobin can carry 1.34 ml of oxygen. The oxygen carrying ability of blood is directly proportional to its hemoglobin concentration.
Flu (Influenza) The flu is a contagious respiratory illness caused by influenza viruses. It can cause mild to severe illness. It can also cause death in severe cases. The flu can affect your lungs when you have asthma. It can cause inflammation (swelling) and narrowing of your airways.
However, some people. can get very sick from the flu and can die. Many of the people who get very. sick are older than 65 years or have a medical condition such as: diabetes, heart disease, asthma, or kidney disease, or are pregnant. Children younger. than 5 years of age are also at greater risk.