Rate of loss of virion infectivity.

Comparison of the rate of loss of virus infectivity at 37°C for (A) influenza A (H1N1) virus (A/New Caledonia/20/1999-like clinical isolate) from [17] against that for (B) the respiratory syncytial virus (RSV A Long) from the present work (blue dots joined by dotted blue line). While the loss of infectivity by influenza A virions follows an exponential (straight black line), that of RSV does not appear to, yielding a lower R2 value. The dots and error bars represent the geometric means and standard deviations of 3 biological replicates (influenza) or 2 measurement duplicates from a single biological experiment (RSV).