Is the story of Jesus in the Bible borrowed from other religions?

Did early Christians borrow from other religions? Isn’t it true that many belief systems in the first century included stories of a savior? For example, Mithra was supposedly born of a virgin on December 25th, had 12 disciples, and rose from the dead after three days. If writers of the New Testament borrowed this story, does that invalidate the truth of the Bible? Click here to read the article.