@startuml
class Dosage
class Vaccine{
-name
-brand
-code
}
class CenterCoordinator
class SNSSystem{
-database
}
class VaccineType{
-code
-designation
-brand
-duration
}

Vaccine "1" -- "*"Dosage: is part of <
Vaccine "*" -- "1"VaccineType: is part of >
Vaccine "*" -- "1"SNSSystem: is store on >
VaccineType "*" -- "1"SNSSystem: is store on >
SNSSystem "1" -- "*"CenterCoordinator: have access <
@enduml