By Joyce Ho
NBC News

Whooping cough has resurfaced this year at an alarming rate. In Washington State alone 640 cases have been reported and confirmed as of March 31st compared to 94 cases in the same period of time. Other cases have been reported in Oregon, Vermont, and certain areas of California.

Experts warn that lack of vaccinations and booster shots are behind this new epidemic. Here’s what you need to know to protect yourself from this nasty infection.

What is whooping cough?

Whooping cough is an airway infection caused by the Bordetella pertussis bacteria that results in significant illness and risk of death in children, especially those younger than one year old. The World Health Organization estimates that there are 20 to 40 million cases of whooping cough in the world per year, with 90 percent of those cases occurring in developing countries. In 2010, there were 27,550 reported cases of pertussis in the United States, according to the Centers for Disease Control.

What are the complications associated with whooping cough?

Infants less than six months of age are at highest risk for developing severe complications from pertussis. Pneumonia, rib fracture or hernias from violent coughing, seizures, and fainting can all arise from whooping cough. Because infants have less developed immune systems, these complications from pertussis can be life-threatening.

How is whooping cough spread?

Whooping cough is spread through droplets in the air during coughing or sneezing. The bacteria is breathed in through the nose and then travels throughout the airways. This disease is highly contagious.

What are the symptoms of whooping cough?

The word “pertussis” means “violent cough,” and that is the most striking symptom of this infection. The uncontrollable coughing spasms produce a distinctive “whooping” sound when patients try to breathe, and can lead to vomiting, loss of consciousness, and choking. Whooping cough begins with symptoms similar to the common cold – fever and runny nose. About a week later, patients start experiencing deep and violent coughing spells that make it hard to breathe. This cough usually lasts one to six weeks, but may persist up to 10 weeks.  

Click here to hear what whooping cough sounds like.

How do I protect myself against whooping cough?

The DTaP vaccine is a recommended childhood immunization that is given to children at 2 months, 4 months, 6 months, 15-18 months, and 4-6 years. The vaccine combination not only protects against whooping cough but also diphtheria and tetanus, which are other bacterial infections with severe health risks for patients. Because immunity against this bug goes down over time, booster shots are recommended in people ages 11-64. For more information visit the CDC's website.

What do I do if I have it?

Treatment includes antibiotics such as erythromycin if the infection is caught early enough. Babies with whooping cough are usually treated in the hospital because they are at higher risk for severe complications.

To prevent yourself from spreading whooping cough to others, wear a face mask or cover your mouth when coughing. Do not go near babies and young children because they are very susceptible to the disease. Make sure everyone in your household is vaccinated and protected against pertussis.

For more information, visit:

NIH: http://www.ncbi.nlm.nih.gov/pubmedhealth/PMH0002528/

CDC: http://www.cdc.gov/pertussis/