> North america was pretty isolated from europe but bad things still happened. I don't think this and the hypothetical moon pathogen are comparable. In the ca

> North america was pretty isolated from europe but bad things still happened. I don't think this and the hypothetical moon pathogen are comparable. In the case of smallpox in North America, the native Amerindian population had no acquired immunity to smallpox but smallpox had already evolved to be very effective at spreading through human populations. But in the case of lunar pathogens, both the pathogen and humans would be new to each other. The lunar pathogen would not be evolved to spread in humans.