We have been told that whatever have Merit must correspondingly have demerit. Well blockchain has brought in many improvement in our ecosystem and has come to help perfect the way we work. But blockchain is very complex to understand. and it requires up-to-date technological knowledge, power availability is a must and a strong internet connections is paramount. 

The benefits of blockchain, however, are more than big enough to sustain its relevance for generations to come. Without further ado, here are the most important benefits of blockchain that may prove to be useful to businesses like Supple Chain, Quality assurance, Accounting, Smart contracts and much more.

The Maltese Prime Minister also to support crypto and blockchain in the real world:

https://coincodex.com/article/2424/maltese-prime-minister-joseph-muscat-supports-crypto-and-blockchain-in-un-speech/

I'd love to see you give an actual explanation or example of how the use of a blockchain in the medical industry is a superior way to story sensitive data.
When you talk about using blockchain to store personal medical data, do you mean a public blockchain or a private one?

How will you give access to the people who need access and how will you prevent unauthorized access?

There are many busyness logics hard corded in to the blockchain network. I really interest about smart contacts as an example for that is If I have a vehicle coming from Japan to Australia in the terms of the agreement when it lands in Australia I pay the company. Instead of paper works and sending money, you can have a smart contact like If received to the port then send money. Also I don't need to trust the vendor or any other person I just need to trust the blockchain network.

Forgive me for expressing my disagreement, but I believe that we could also say that blockchain is fast. It depends on what we compare it with. The transactions are also relatively cheap and I am not sure what you mean when you say it's expensive to run (no need to make a PoW rather than PoS and ICO allows to gather money for initial development). In about 10 minutes the network receives the first confirmation of the transaction (which is usually when companies start processing your request, so we could say that this is the transaction speed) and the fee is $0.6. When I recently made a Swift transfer on 400 euros, the fee was about 15 euros (!) and it took two working days for the transfer to be received.

I think that an important disadvantage of blockchain is that as the network gets bigger, transaction fees and speed are inevitably becoming worth. That's why I think DAG is a very attractive technology, because it has the biggest issues during the initial stage with improvements as the network expands.

Seems OP is talking about a public blockchain since there's some product that used this for more accessible data and to avoid medical counterfeiting however I see this as a threat for our medical records since everyone can able to see it in which contradict to our traditional record keeping.

Let's not put everything to blockchain as some things are better off without this.

1. a blockchain doesnt need to be fast for very purpose. and can be made faster and more efficient without needing to step away from blockchains.
2. it can be efficient with the right devs that want to care about blockchain efficiency coding it instead of saying it cant be made efficient
3. a blockchain can be free to run.

i feel that your bias's against blockchains have become more apparent. and im starting to wonder why you post on a forum that uses blockchains as its main security model.

when you stop imagining a blockchain as a one dimensional strand. and instead view it 3 dimensionally

EG imagine a doctors surgery of 6000 patients has a chain of hashes. the personal data not being the chain. but being a UTXO database of encrypted data. and each new block of daily updated records is updating hashes. not clear text data.

each doctors surgury strand of chain. hass a block or UTXO header that gets added to a master chain. and so the network is not validating what the clear text says. but validating the hashes add up.
and its the doctors and patients in their smaller subchains that validate that personal stuff

it also helps so that its not one massive chain of a nations patient records. but subchains that regions/townships manage at sublevels.

ok, but the real question is WHY?!!!
it is not about how it is done it is about whether doing it that way is better than how we are currently doing things.

for example take the case of bitcoin versus the banks. I have a bank account and a debit card issued by the bank. whenever I want to purchase something I use that and there is no fees involved. it is fast and safe enough. so why would I need bitcoin? the answer is obvious (the decentralization, global,...) I won't get into that. but there is a valid answer to that "WHY" question which is why bitcoin exists and is strong.
but I can't say the same about using blockchain other fields such as a hospital and its patient information.