and when he talked about the us being an arsenal of vaccines, how has that worked out? it is mixed. i think he did it with good intention and the challenge is that the moderna and pfizer vaccines require a big freeze in order to travel in developing countries and countries in africa for example don't have the infrastructure to distribute it and it requires something more flexible and novavax has a vaccine that's been much delayed that they had hoped would be a solution and would be a much simpler response. it's still having problems, it's not been produced yet in the us, so there have been technical and logistical problems but they are also financial problems for this grand pledge of a billion vaccines to the world is not getting enough funding and has said if we don't get more