Just a thought: I, like you, thought there might be a correlation between immigration and this increase in pertussis but was unable to find such a correlation.
Then the thought occurred to me.....maybe there's a correlation between "vaccine resistance" and the increase in pertussis. Remember when we were kids and had to get the DPT vaccine?
see:https://www.shadac.org/news/childhood-vaccinations-rate-by-state-ethnicity-insurance
Then the thought occurred to me.....maybe there's a correlation between "vaccine resistance" and the increase in pertussis. Remember when we were kids and had to get the DPT vaccine?
see:https://www.shadac.org/news/childhood-vaccinations-rate-by-state-ethnicity-insurance