I am not a big fan of Alex Berenson. I don't like journalists because they don't understand population statistics. They are interested mostly in anecdotal cases and their duty is to write about them in an interesting and viral way. And yet, that is an important service to identify targets that are worth of deeper analysis.
In Alex case while he missed many times, he also hit some good targets.
vaccine effectiveness against infection is lost withing 3-4 months
prior infection provides stronger immunity than vaccination
The second was always suspected but the evidence was always lacking. Now it turns out that twitter supressed tweets that announced the first real evidence (even if not very strong) that it is the case. I believe that this suppression likely extended wider than just twitter and ultimately influenced the US policy to not recognise immunity from infection when vaccine mandates were put in place. In contrast, most European countries with mandates recognised immunity from prior infection in one way or another as inferior or equal to immunity from vaccination.
There might be some practical considerations – vaccination is easy to register and provide proof. Prior infection is more nebulous, requires expensive testing, some tests are less reliable. The whole idea casts shadow how reasonable vaccine mandates are in the first place. Some would worry that the recognition of immunity from prior infection could also encourage vaccine hesitant to seek getting infected.
Such policies however are very risky because they are conditional on us never finding out the truth. It was always more likely that prior infection confers stronger immunity than vaccination. It was stupid to try to supress the evidence at any time. Eventually it surfaced (as it was bound to) and made those attempts to control narrative look evil.