what are some of the ethical guidelines researchers must follow when testing a new vaccine for COVID-19?

Write at least one paragraph (at least 6-7 sentences) for each question below in the Discussion Board Forum.(1) According to the Nuremberg Code, what are some of the ethical guidelines researchers must follow when testing a new vaccine for COVID-19?(2) According to the Declaration of Helsinki, can researchers test a new COVID-19 vaccine on children before testing it on adults? Why or why not?