Canada has reported a second case of rare blood clots with low platelets after immunisation with AstraZeneca's Covid-19 vaccine in a week, while it said it still recommended the use of the shot, Reuters reported.

The person who experienced the very rare event has been treated and is recovering, Canada's health ministry said in a statement, adding that the person lives in the province of Alberta.

Based on the evidence available, Canada still maintains that the benefits of the AstraZeneca vaccine outweigh the potential risks, the statement said.

Canada health authorities "will continue to monitor the use of all Covid-19 vaccines closely and examine and assess any new safety concerns", the statement said.