Short answers, pulled from the story.
The word Beatlemania first appeared in print on the 21st of October 1963, when the Daily Mail published a feature story by Vincent Mulchrone. This headline marked the moment British press officially named the frenzy surrounding the band.
Within days of their arrival, 73 million people tuned in to watch the band perform on The Ed Sullivan Show, representing about two-fifths of the American population. This broadcast set records for television viewership never before seen in the United States.
An audience of over 55,000 filled all four ascending decks, generating takings of $304,000 and creating collective screams that escalated to what The New York Times called pandemonium. The noise made it impossible for the band to hear themselves play during this first large outdoor stadium performance.
John Lennon's remark that the group had become more popular than Christ caused a storm of American public protest when Revolver was released in August 1966. Records were publicly burned while Ku Klux Klan members picketed concerts across the Bible Belt due to claims that the Beatles were anti-Christ figures.
By late 1966, the Beatles gave no more commercial concerts until their break-up in 1970, focusing instead on recording studio work. McCartney finally ceded to bandmates' insistence that they stop touring toward the end of 1966, stating four years was enough for anyone.