Which of the following efforts to control a virus would be ineffective ective

How can antibodies "remember" a particular bacterial invader or "antigen" on that invader?

As noted in the illustration, homo heidelbergensis was a tall, muscular hunter, who used both tools and weapons. because h. heidelbergensis was not a gatherer/forager, but ate a varied diet including meat and fish, we would expect to see what anatomical changes?

The work cited page list citations in the following order