Epidemic 7.3k - Part One

They never saw it coming. The Government told them not to worry. It was just a virus, and they had the vaccine for it. But, it spread quickly. Thousands more were infected. Something had to be done. A super vaccine was produced. Guaranteed to subside the virus. No adverse side effects. So, they said. Having had no time to run tests, it was released to the general public. And, it worked. The virus was subdued. But.
The side effects weren't. There was another epidemic, much worse than the first. The Zombies.