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The Daily Mail uses "low brow" words such as "jab" and "sacked" because they want to attract a certain demographic.
I would expect the BBC or Guardian to use the words "Covid vaccine" and "made redundant".
Semi-related question. Is there a medical, political, etc. reason that the word "jab" is sometimes used when referring to vaccines? (Is jab a standard medical term?) I feel like "Covid vaccines" sounds more neutral, and I can't tell what the word "jab" is supposed to elicit for the average person. Do we use the word jab because it's shorter than vaccine, and George Lucas saves on ink when it's printed on Star Wars figures?