What he was saying seems to be quite the opposite of what clearly was the case: he was saying she messed up, but their procedures and methods are totally adequate. Even if she did somehow mess up, that alone would suggest that the procedures and methods are inadequate.
With more than 100 medical professionals already lost to the disease in Africa, that would already seem to have been a reasonable supposition.
You are correct except that it is 416 infected and 233 dead medical professionals in Africa. The procedures are inadequate. Even if 416 people who knew their lives depended on it violated procedures. The procedures should be designed so that a non-specialist working long hours and with a real-world level of training can follow them well enough to survive. Otherwise, the procedures are by definition defective.