Hospitals come and go -- especially on our island. You can always tell when the hospital comes because it's a large mobile contraption that rolls off the ferry. When it's time to go, it rolls back onto the ferry and you can wave goodbye to the hospital as it goes back out to sea. It's basically a big bus, stocked with everything you could possibly need for 10 minutes.
Recently, the mobile hospital came to our island to collect blood. Manned by women who are Red Cross nurses, they collect people's blood, then drive off. No wonder it's called a blood drive.
But to me, the mobile hospital is more like a giant mosquito that comes, sucks out your blood, then leaves. I've named this mosquito-bus Lance.