Rear Adm. Joyce Johnson, USPHS (Ret), D.O., M.A.
or the flu, is a respiratory illness caused by a virus. The flu can
have serious consequences and is most dangerous for those over 65 years
of age, very young children, pregnant women, and those with certain
chronic health problems such as immunosuppression, asthma, diabetes, or
heart disease. Complications from the flu include bacterial pneumonia,
ear and sinus infections, and worsening of other medical conditions. The
flu results in thousands of deaths annually. Because both colds and the
flu are caused by viruses, antibiotics aren't useful in treating them.
symptoms can include fever, cough, sore throat, body aches, and
fatigue. The flu is transmitted by droplets spread by coughing,
sneezing, and even talking. It is contagious starting the day before
symptoms start, until about a week after.
To help prevent
transmission of the flu (as well as the common cold and other
infections), use good personal hygiene: Cover your mouth and nose when
coughing or sneezing; wash your hands frequently; and if you feel sick,
stay home and don't expose others.
The best way to prevent the
flu is to get vaccinated. A flu shot can prevent you from getting sick
and thereby prevent you from spreading the flu to others. Each year, the
flu vaccine is adapted to prevent the specific strains of flu expected
to predominate. Because the vaccine is tailored to the strains expected
that year, it is important to get an updated flu shot each year.
vaccination is recommended for most people over 6 months of age. There
are different vaccines for this year's flu strains. The most common
vaccines are injected into a muscle, usually in the upper arm for
adults. A high-dose version of this vaccine is available for people age
65 and older. Various pediatric vaccines also have been developed. A
nasal-spray vaccine is available for healthy people ages 2 to 49 years
(who aren't pregnant.) Some vaccines provide protection for three
strains of flu, some for four strains. Your health care provider can
offer guidance on which flu vaccine is best for you. Remember, the flu
vaccine does not cause the flu.
Consider updating your other
vaccines as well. A single dose of shingles vaccine is recommended for
those 60 years and older, as well as a single dose of pneumococcal
(pneumonia) vaccine for those 65 and older. Adults also should get a
diphtheria/tetanus booster every 10 years. The indications for these and
other vaccines vary for those with certain chronic diseases such as
diabetes; chronic liver, kidney, or heart disease; or weakened immune
systems. If you are traveling abroad, additional vaccinations and health
precautions (such as medication to prevent malaria) can be