Cancer researched data is very sensitive, so you should try to avoid putting this data on a public Blockchain if it contains people's medical particulars. The advantage of putting cancer research data on a Blockchain is that it is immutable and it cannot be changed by people with hidden agendas.

Donations for Cancer research amounts to Billions of Dollars and people who donate to efforts like this, would appreciate more transparancy on a public Blockchain to follow the progress of these experiments.