There's been a ban on flights between Canada and India for three months, due to fears about the Delta variant of COVID-19.
The prohibition was recently extended for another month.
But there's no such ban on flights between Canada and the United Kingdom, where COVID-19 cases jumped nearly 41 percent over the past week, according to Reuters.
That's prompted Amir Attaran, a professor of law and and public health at the University of Ottawa, to demand an explanation from Prime Minister Justin Trudeau.
"Why did you put a COVID travel ban on...India but not on the UK, where cases are 6500% higher than Canada?" Attaran asked over Twitter. "What explains your choice if not racism?"
The U.S. Centers for Disease Control and U.S. State Department have issued warnings to Americans to avoid travelling to the U.K. due to very high levels of COVID-19 cases.
Global Affairs Canada has recommended that Canadians avoid non-essential travel to the United Kingdom, which reflects the same recommendation for most other countries in the world.
The following countries carry the recommendation "avoid all travel": Iran, Afghanistan, North Korea, Chad, Iraq, Libya, Mali, Somalia, Syria, Yemen, Burundi, Central African Republic, Myanmar, South Sudan, and Venezuela.