What is another word for "panacea"?

Panacea means “a remedy that says it will cure all illness and difficulties.”
The software update is supposed to be a panacea for all of the security risks on the website.
Quarantine means “strict isolation imposed to prevent the spread of disease.”
All personnel exposed to the virus will be placed in quarantine in the far end of the hospital and not allowed to interact with healthy individuals.
Antibiotic means “a medicine that helps a person or animal heal from infection by destroying or limiting harmful microorganisms.”The doctor prescribed a strong antibiotic for the patient’s bronchitis.Milieu means “the environmental condition or setting.”As the daughter of a legendary guitarist, Samantha grew up in a musical milieu.