[robocat]

On second thoughts perhaps the idea wouldn’t work in countries that don’t have an effective lockdown. Could the infection wave of a less dangerous genotype overtake the number of infections of the more dangerous genotype before the population has been mostly infected already?

[danieltillett]

Yes if we act soon as we can spread the less dangerous version faster than the normal human-to-human spread of the dangerous version. For example if we were to send a postcard infected with the less dangerous version to 10 million people it would get out ahead of the dangerous version spreading normally.