A look at the top medical headlines for the week of November 1, 2020 including: The official death toll in the United States from COVID-19 is around 230,000. But a new study shows that the real number could actually be much higher. Then, Covid’s effects on virtually every organ of the body have been noted for months… And a new study shows that its effects on the brain can be profound. Then, a study shows that a new experimental technique can regenerate the cartilage that cushions joints. And finally, marijuana use in pregnancy is on the rise… but a new study finds that children born of pot-smoking moms are more likely to have mental health issues.