public void DefenseImmunity(int damage, Virus virus)
{
Immunity.Defence(damage, this, virus);
Console.WriteLine(this.ToString(virus));
}
public Chinese(int percentageOfImmunity = 70, bool isInFected = false, Virus virus = null, bool isDead = false)
{
Immunity = new Immunity(percentageOfImmunity, virus, isInFected);
IsDead = isDead;
}