Does that article not sound EXACTLY like so many apocalyptic science-fiction book first chapters? Whenever I hear these news articles I think of the "great filter" theory. Nature is indifferent in the methodology used to balance our planet's ecology.
What is it about? Why are they attacking these centres. Mistrust of vaccines? Those who administer vaccines? Not wanting to change their burial rituals? Another example of not trusting science? Lack of education? The article was rather vague about why the militia groups were attacking the centres.