Almost immediately after former US president Joe Biden's office announced he had been diagnosed with an aggressive prostate cancer, anti-vaccine advocates were blaming his condition on the Covid-19 jabs he publicly received and championed.

Before his cancer diagnosis, Biden had been taking the train from Delaware to Washington, meeting with his post-presidential staff, allies and former Cabinet secretaries, accordin

After a stretch of limited public appearances since leaving office, former President Joe Biden’s cancer diagnosis arrived amid heightened scrutiny of his cognitive health.