This week's health news:
https://www.latimes.com/science/story/2019-08-13/experts-recommend-drug-screening-for-all-adults-opioids
https://gizmodo.com/a-chlamydia-vaccine-shows-promise-in-early-human-trial-1837213981
https://www.studyfinds.org/study-live-longer-by-eating-apples-drinking-tea-flavonoids-every-day/
https://www.goodhousekeeping.com/uk/health/a28608727/blood-pressure-range/