Answer:
Oral poliovirus vaccine or Sabin vaccine, named for its inventor American physician and microbiologist Albert Sabin, was developed. OPV contains live attenuated (weakened) virus and is given orally.
Answer:
An animal with a backbone.
Explanation:
Answer:
I think it would be like how the earth formed and other planets except way smaller but I'm not sure
Divide into parts (Usally goverment or states ei, cicil war, north south spilt into 2
