In cyber security, a vaccine is a digital solution that focuses on neutralizing attacks once they gain unauthorized access to an information system. Cyber vaccines exploit flaws in the way some malware strains work and spread, so their distribution and effects can be blocked. A cyber vaccine could train an information system to detect and stop cyberattacks after they’ve penetrated the system/PC just before the attacker can do any actual damage. Cyber vaccines are a new concept, so there is a lot of work to be done for their advancement. They can potentially be used to stop ransomware, block data exfiltration, intercept phishing attacks, block Zero Day exploits and more.