The fact that abiotic amino acids are rare on the Earth could mean that they always come within larger meteoroids that are all burnt up except in the rare situations such as an impact of a large object, e.g. the K-T boundary impactor. It is the volatile component of cometary outflows that carry biological particles and biological molecules in our model. Such interchange would hardly allow spatial separation of biologic and abiologic amino acids in vapour, ice and solids. In our model it takes all the resources of all the stars in the Universe to get the first living system started, but once begun its continuity and propagation is assured. Comets mop up and vastly amplify a minute surviving fraction of bacteria from a presolar cloud.
Influenza epidemics are four times more likely during solar maxima.