Actually, to have survived the virus itself qualifies as being vaccinated, even though he did not receive a vaccine. The idea of a "vaccine" was created after it was noted that milkmaids who had suffered Cowpox didn't get Smallpox. They'd been "Vaccinated" by the cows (Vaccinae.) Then, from this, they created the idea and the first "Vaccine."
So yeah, Rand was Vaccinated by the Chyna Virus ITSELF.
He had the damn virus and doesn't need to be vaccinated.
Actually, to have survived the virus itself qualifies as being vaccinated, even though he did not receive a vaccine. The idea of a "vaccine" was created after it was noted that milkmaids who had suffered Cowpox didn't get Smallpox. They'd been "Vaccinated" by the cows (Vaccinae.) Then, from this, they created the idea and the first "Vaccine."
So yeah, Rand was Vaccinated by the Chyna Virus ITSELF.
Naturally vaccinated by his own immune system.
soon to be illegal