As the economy needs to re-open, authorities require "COVID-19 free" medical to allow people to travel or to work. On the other hand, the media has been littered with news about fake COVID-19 medical certificates sold illegally.

What it does

The antibody test result can be stored in blockchain such as Etherium. For example, the COVID-19 PCR test result is recorded in an immutable ledger. Therefore this source of truth reduces the risk of forgery. The wider impact would be stopping the spread of a pandemic.

How I built it

The initial prototype is build using on Ethereum TestNet.

Challenges I ran into

All information stored on the Ethereum blockchain can be viewed by everyone. Therefore need to strike a balance between privacy and blockchain "perfect" transparency.

What I learned

To minimise the gas costs, I made the Solidity contract as simple as possible.

What's next for Antibody Blockchain

Need to improve the Solidity contract

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