He only addresses it indirectly by saying we shouldn’t develop very targeted approaches (which is what gain of function research is about) and instead fund interventions that are more broad. The talk doesn’t mention the specific risk of gain of function research.
Here is a video of Prof. Lipsitch at EA Global Boston in 2017. I haven’t watched it yet, but I would expect him to discuss gain-of-function research: https://forum.effectivealtruism.org/posts/oKwg3Zs5DPDFXvSKC/marc-lipsitch-preventing-catastrophic-risks-by-mitigating
He only addresses it indirectly by saying we shouldn’t develop very targeted approaches (which is what gain of function research is about) and instead fund interventions that are more broad. The talk doesn’t mention the specific risk of gain of function research.