Cells make up about what percentage of total blood volume?

Which counter claim is most effective against this claim? rob's essay includes

Something you may do if the weather's nice on sunday. -something you might not want to do this evening. -something you could go on aaturday evening. -something you could wear to a party. -somebody you might see in the next couple of days. -a subject you could study at college or university. -somewhere you might go on holiday .

Ineed a hook for a persuasive essay on vaccinating your kids and why you should