M/S of little boy (Tony) being examined by a doctor. The commentator says that he is recovering from whooping cough. L/S and M/Ss of Decompression chamber. Tony is helped into the chamber with other children. M/S of dials measuring altitude. C/U of little girl reading book. M/Ss of nurse speaking to doctor outside the chamber by telephone. M/S and C/U of nurse hugging little girl.