“Because of the cyclical nature of pertussis outbreaks, periodic reemergence of pertussis epidemics can be anticipated.” – CDC MMWR Weekly, September 05, …
freedom to choose – right to refuse
freedom to choose – right to refuse
“Because of the cyclical nature of pertussis outbreaks, periodic reemergence of pertussis epidemics can be anticipated.” – CDC MMWR Weekly, September 05, …