Mars Solar Storm
NASA have released a video of Mars being subjected to a solar storm, this research clearly has implications for any humans going to Mars, as solar radiation will put them at risk of serious exposure.
The video and article can be seen here
On a related note, I read an article a while back about using Boron Nitride as shielding for space missions, this could be one way to protect astronauts.
Science Direct has an article on Multi-layered shielding materials for high energy space radiation and there is a paper about Boron Nitride on arXiv. However, this seems to be more about shielding from Neutrons.
More info on Boron Nitride.
There is other research, and it is something that needs further study, It would be interesting to find out if we would need to make shielding or if we could perhaps find Boron on Mars, and extract and mine that. There is an article on here on Boron ore from Geology Science
Going to be interesting how we solve these issues both on Mars and of course on the Moon. Probably not that easy or cheap to do at scale.