Colds and flu can lead to serious conditions, like bacterial pneumonia, if not treated properly. Steer clear of the bacteria and viruses that cause respiratory infections. Here’s how:

• Get immunized. Adults who have chronic heart or kidney disease, chronic bronchitis, cystic fibrosis, asthma, emphysema, chronic anemia, severe diabetes or an impaired immune system should have a yearly flu shot. Adults ages 50 or older should also be vaccinated, as should health care workers, police officers and firefighters. If you’re age 65 or older, you should also receive the pneumonia vaccine.
• Cut down on handshakes. Today, schoolchildren are taught to cough and sneeze into the crook of their elbows. But most adults still use their hands to cover up a cough or sneeze. While this prevents infected droplets from getting into the air, it makes hand-to-hand contact risky business for anyone trying to stay well.
• Wash your hands. You can pick up bacteria and
  viruses on countertops, faucets and door knobs.
  Frequent hand washing with soap and water will
  help keep any germs on your hands from reaching
  your mouth, nose or eyes—popular entry points for
  microscopic invaders.
• Protect your immune system. Like the rest of
  your body, your immune system works better when
  it gets enough rest, enough exercise and enough of
  the right foods. Eating a balanced diet that includes lots of fruits, vegetables and grain products will supply your body with the vitamins and minerals it needs to fight off illness.