before visiting some of the areas worst affected on the ground. some 400 towns and villages were battered by the storms and emergency services are still searching for a number of people who are missing. president biden has tested positive for covid i9 for a second time and is returning to isolation. but his white house doctor says the president continues to feel quite well . the 79 year old returned the positive test on saturday morning, after four consecutive days of negative results. doctors believe biden is suffering a rare case of rebound positivity experienced by some coronavirus patients. earlier i asked dr peter hotez, co director of the texas children s hospital centre for vaccine development, how a covid rebound infection comes about. what happens is, you know, you take a course of paxlovid, which you typically give early on in the course of the illness in order to stop virus replication.
we can now speak to doctor peter hotez, who s the director of the texas children s hospital centre for vaccine development. he joins us from houston. thank you very much for being with us. what is the cdc recommending?- with us. what is the cdc recommending? the cdc has recommended recommending? the cdc has recommended the recommending? the cdc has recommended the use - recommending? the cdc has recommended the use of - recommending? the cdc has| recommended the use of two different vaccines, either from matt turner or pfizer. the pfizer has been released for three doses, the first three weeks apart and the third eight weeks apart and the third eight weeks after that. for the dharna, it s a two dose vaccine but the dharna reports that there may be a third dose. the big issue will be how widely accepted these are going to be because in the us, for the five to 11 because in the us, for the five to ii year olds, only about 30% of parents are vaccinating their kids for the five to ii