  Covid-19 (SARS-CoV-2) has changed almost all the aspects of our living.
Governments around the world have imposed lockdown to slow down the
transmissions. In the meantime, researchers worked hard to find the vaccine.
Fortunately, we have found the vaccine, in fact a good number of them. However,
managing the testing and vaccination process of the total population is a
mammoth job. There are multiple government and private sector organisations
that are working together to ensure proper testing and vaccination. However,
there is always delay or data silo problems in multi-organisational works.
Therefore, streamlining this process is vital to improve the efficiency and
save more lives. It is already proved that technology has a significant impact
on the health sector, including blockchain. Blockchain provides a distributed
system along with greater privacy, transparency and authenticity. In this
article, we have presented a blockchain-based system that seamlessly integrates
testing and vaccination system, allowing the system to be transparent. The
instant verification of any tamper-proof result and a transparent and efficient
vaccination system have been exhibited and implemented in the research. We have
also implemented the system as "Digital Vaccine Passport" (DVP) and analysed
its performance.
