Hackers can get there way into the information of a person and use it against the person.

Blockchain is not immune to attack by hackers but it being cryptographically secured is for better than conventional systems.

Blockchain technology makes possible the tracing and keeping of medical supplies possible.

Yeah that is correct . It is possible with the help of the chips go to the medical supplies which can communicate with blockchain and generate time signals.

Very informative piece of writing .