How to avoid Spectre & Meltdown attacks

Hospitals and clinics have been storing confidential medical files and patient data in highly protected servers. But unless patches are being installed, Spectre and Meltdown attacks could undermine the security of healthcare providers.
Why is Spectre and Meltdown a big problem for healthcare providers?
Spectre and Meltdown are security flaws in computer chips that give hackers access to all data saved in the server, circumventing even encryption and multi-layered security systems.