Julietta Losoyo, right, a registered nurse at the San Diego Public Health Center gives a whooping cough vaccine in December. California faces a shortage of nurses and other front-line health workers.
Julietta Losoyo, right, a registered nurse at the San Diego Public Health Center gives a whooping cough vaccine in December. California faces a shortage of nurses and other front-line health workers. Chris Carlson The Associated Press
Julietta Losoyo, right, a registered nurse at the San Diego Public Health Center gives a whooping cough vaccine in December. California faces a shortage of nurses and other front-line health workers. Chris Carlson The Associated Press