More than 5270 cases of whooping cough reported on the epidemic in California, the nine children were killed, is growing this year.

This week gave the report of the Department of Public Health of California, that the most infectious diseases in many countries it is not reported since 1955, when 4949 cases a year were infected.

Whooping cough is a disease that cyclical peaks of several infections every five years.

The symptoms are similar to the cold, making it a challenge to diagnose. A persistent cough for weeks, symptom monitoring of the disease, even whooping cough.

Susceptible to bacterial infections during the summer months, but this report is still difficult to determine whether the peak direction.

Typically, babies are a series of vaccinations to be up vaccination between the ages of 4 and 6 and again after his 10 years.

All pertussis deaths – in California occurred in infants too young to fully combat the disease, why state health officials and doctors urge parents booster is to be vaccinated. Reduced immunity to pertussis vaccine is recommended so that the booster every 10 years for adults.

The law was signed by the Governor. Arnold Schwarzenegger to come last week, all middle schools in California school pertussis booster before starting school next year. In 2012, the Act also require students to get degree of boosters.