The common cold is a viral infection of your nose and throat (upper respiratory tract). It's usually harmless, although it might not feel that way. Many types of viruses can cause a common cold. Symptoms: Runny or stuffy nose, sore throat, cough, congestion, slight body aches or a mild headache, sneezing, low-grade fever. Prevention: Wash your hands, disinfect your stuff, use tissues, don't share, take care of yourself.
Influenza is a viral infection that attacks your respiratory system — your nose, throat and lungs. Influenza is commonly called the flu, but it's not the same as stomach "flu" viruses that cause diarrhea and vomiting. Symptoms: Fever, aching muscles, chills and sweats, headache, dry, persistent cough, shortness of breath, tiredness and weakness, runny or stuffy nose, sore throat, eye pain. Prevention: Annual flu vaccine, hand-washing, avoiding crowds.
Hypertension is a condition in which the force of the blood against your artery walls is too high. Usually hypertension is defined as blood pressure above 140/90, and is considered severe if the pressure is above 180/120. Symptoms: Often has no symptoms. Over time, if untreated, it can cause health conditions, such as heart disease and stroke. Treatment: Eating a healthier diet with less salt, exercising regularly, and taking medications can help lower blood pressure.