Hey dcho, here are some suggestions and personal thoughts for your references
1. I personally don't agree living longer and life expectancy is consider as consequence of
improved medical care. Living longer and life expectancy is not necessary negative, moreover, positively....
2. I suggest you rewrite your thesis, because the first impression of your essay is currently confusing.
3. I had many grammar mistakes, I will look further more after the confusion is cleared.
4. Make sure you use variety usage of vocabs and synonyms as many words has repeated a lot.
5.
Do you think the disadvantages of this development outweigh the disadvantages?
do you meant by, advantage over disadvantage?