Birth and Death of anyone cannot be determined before hand. Astrology is only useful to the extent of evaluating one’s life between birth and death. No science can ever predict the birth or death time of any living being. Read my blog navagrahastro.blogspot.in
Health and diseases of various parts of the body can very well be evaluated using astrology. Read my article “Medical Astrology” on my blog.
Fake astrologers will say so many things which are impossible to be predicted. Astrology is a mathematical science to evaluate a horoscope based on the birth time(time when the baby cries first which can be heard from 100 meters away since it is a shrill cry)