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.
A person with the flu may experience fever, chills, sore throat, dry cough, headache, fatigue, muscle aches. The symptoms can last two to seven days. Children can sometimes suffer from nausea and vomiting, but these symptoms are uncommon in adults.