Before revision:  We also show that a reduction in the fraction of unaware individuals does not always imply a decrease of the prevalence, as the relative time scale between disease and awareness spreadings plays a crucial role in the systems' dynamics  .
After revision:  We also show that a reduction in the fraction of unaware individuals does not always imply a decrease of the prevalence, as the relative time scale between disease and awareness spreading plays a crucial role in the systems' dynamics .