Gardeners should get a tetanus shot every ten years, because tetanus bacterium can live in soil and manure. It only takes a break in the skin--and what rosarian doesn't have battle wounds?--for Clostridium tetani to attack the nervous system. Most people think of lockjaw, but there is so much more to the symptoms. It's a long, lingering, horrifying death that can last for weeks. So, get your innoculation!
And *ow* I got mine yesterday, and my arm is sore! But it's better than having convulsions strong enough to break bones.