An interesting article by a Professor giving her reasons why she believes shielding the vulnerable then trying to build up population immunity will not work and is dangerous.
She is not however advocating another lengthy lockdown as she points out that there are countries with densely populated urban populations such as Japan and South Korea who got case numbers down and are maintaining low levels of the virus with social distancing, masks and a good contact/trace system.
www.politics.co.uk/comment-analysis/2020/09/29/covid-the-libertarian-population-immunity-strategy-is-wrong