We’ve all had to learn more than enough about pathogens in recent months — how contagion spreads, how our immune systems work, what vaccines do and so on. All of us, that is — apart from President Joe Biden, it seems. On Sunday, in order to demonstrate that he ‘listens to scientists’— an important campaign promise — the Commander-in-Chief posted a video of himself being lectured by the Scientist-in-Chief, Dr Anthony Fauci, the man who used to tell us not to bother with masks but now says we’ll still be wearing them until, oh, maybe forever.