How quick do I need to get the vzig after I have been in contact with the varicella virus?

ASAP. You should get this as soon as possible after exposure, before you have any symptoms. It is not necessary if you have tested positive for IgG antibodies against chicken pox.
Do you qualify ? Vzig is a material that is usually limited to those with naturally weakened immune systems or weakened by cancer chemotherapy that are particularly prone to complications of varicella.It is given as soon as possible after identified exposure. If you are normal & had the illness in the past none is needed & you are unlikely to be able to get the material.