challenges we're hearing about covid testing? >> thank you so much for this very important question. testing remains a critical priority for this administration. when we saw the unprecedented cases of omicron in south africa and europe, we immediately reached out to our manufacturers to understand any supply con straights they had and to evaluate their surge capacity. we have also met daily with them to make sure that they have what they need from their suppliers and have used the defense production act authorities 12 times throughout this pandemic in support of testing needs. most recently in the last few weeks for two tests we were able to unlock supplies and manufacturing capacity. we continue to invest in rapid over the counter tests which are in high demand and in the fall we invested $3 billion to