Typically in vaccine trials, teens and pregnant women are not included in the first instance because they represent a high-risk group. There's a concern that they not be exposed to a vaccine until it's been tested to be safe and effective by the regulator. However, as we speak, there are now trials going on with younger-aged volunteers in those trials to see whether the vaccines are safe, as well as being effective in younger children.
I think the same will be true for pregnant women shortly. Both the WHO and that U.S. FDA have issued guidelines around that, which are somewhat contradictory. On balance, I think the view is that it's probably safe and effective for pregnant women to take the vaccine, especially because there is good evidence that being affected with the virus when you're pregnant makes you particularly susceptible to a serious disease outcome.
Again, the trial has not yet been done.