In a Crichton novel, once mass-adopted, the "defective interfering" virus would recombine with the wild one to produce a new variant which is just like the wild

In a Crichton novel, once mass-adopted, the "defective interfering" virus would recombine with the wild one to produce a new variant which is just like the wild one, except it replicates, infects and overwhelms immune systems three times faster.