Marine Le Pen, his closest rival in next April’s presidential elections, added insult to injury, telling Mr Macron that the EU’s disastrous vaccine rollout had become his Waterloo.
Experts predict that the economic fallout from the new lockdown could be much worse than that of the autumn, increasing the political damage for Mr Macron.
Writing in the Daily Telegraph, Sherelle Jacobs accused the French President of seeking to leverage the threat of a vaccine war with the UK to help solve his domestic political problems.
Ms Jacobs said: “In his ruthless approach to solving his own domestic political troubles, Macron risks permanently damaging the EU’s already tarnished reputation.
“If it were to follow through, pharma firms may well decide that they have no choice but to flee in order to safeguard their IP.
“Many would flock to the UK, which has built one of the world’s largest pharma industries on the back of its uncompromising stance on protecting research and development.
“It would be a vindication of Brexit and a bizarre own-goal for Brussels.”