India's Serum Institute will ship Covid-19 vaccines to Canada within a month, in a sign a diplomatic row triggered by Canadian Prime Minister Justin Trudeau's comments on political protests in India was easing.

Adar Poonawalla, the chief executive of Serum Institute of India (SII) — the world's largest vaccine maker — reaffirmed that commitment.

“As we await regulatory approvals from Canada, I assure you, @SerumInstIndia will fly out #COVISHIELD to Canada in less than a month; I'm on it!” Poonawalla said in a tweet, using the brand name under which Serum produces the shot developed by Oxford University and AstraZeneca Plc.