I was thinking they might be working on a more virulent strain.
Probably, if the story'e true.
Strep is handled best by the cephalosporins (first cousins to the penicillins). It is one of the few major bugs that has not become resistant to the penicillin family. Some strains of strep produce scarlet fever (these strains come around in the US every 50 years or so) and we're overdue for it here.