Coronavirus in Quebec | COVID-19 | CTV News Montreal

Delay in second COVID-19 vaccine dose does not reduce protection: study

The Quebec Institute of Public Health (INSPQ) says in a report released Monday that vaccine efficiency to prevent a COVID-19 infection was just over 75 per cent two weeks or more after a single dose and that a single dose reduced the risk of hospitalization due to the novel coronavirus by about 95 per cent. These numbers did not go down after four months.

A senior citizen receives a first dose of COVID-19 vaccine at a vaccination clinic in a hockey arena in Montreal, on Wednesday, March 10, 2021. THE CANADIAN PRESS/Paul Chiasson

Coronavirus: What you need to know

Biochemist Daniela Beatriz Ori manipulates swab samples to make a real time polymerase chain reaction (RT-PCR) analysis for COVID-19 testing at the biochemistry lab of Central Navy Hospital Dr. Pedro Malloon April 28, 2020 in Buenos Aires, Argentina. (Photo by Amilcar Orfali/Getty Images)
Heavy snow falls as people wearing face masks to curb the spread of COVID-19 cross a road in Burnaby, B.C., on Monday, December 21, 2020. THE CANADIAN PRESS/Darryl Dyck
People walk past a "we're open, heated terrace dining" sign at Eli's Essentials on the Upper East Side on February 02, 2021 in New York City. (Photo by Alexi Rosenfeld/Getty Images)
Mother putting a face mask on her daughter. (August de Richelieu/ Pexels)

Virus & Vaccine Trackers

In-Depth COVID Coverage

What you need to know before you book (or put off) your summer trip

While easing travel restrictions may be causing some Canadians to consider taking a trip this summer, there are several issues to take into account before booking those plane tickets, including varying border requirements, trouble finding insurance, and the issue of travelling with unvaccinated children.

Your Finances During the Crisis

CTV News Montreal Top Stories

Delay in second COVID-19 vaccine dose does not reduce protection: study

The Quebec Institute of Public Health (INSPQ) says in a report released Monday that vaccine efficiency to prevent a COVID-19 infection was just over 75 per cent two weeks or more after a single dose and that a single dose reduced the risk of hospitalization due to the novel coronavirus by about 95 per cent. These numbers did not go down after four months.

CTVNews.ca Top Stories

Canada lifting restrictions for fully vaccinated travellers in early July

Canada will be lifting most international travel restrictions for Canadians, permanent residents, and certain foreign nationals who are fully vaccinated, starting July 5. Eligible travellers will not have to self-isolate but will still have to take COVID-19 tests before and upon arrival in this country.

A traveller is dropped off at the departures level of the Ottawa MacDonald-Cartier International Airport on Wednesday, June 16, 2021. THE CANADIAN PRESS/David Kawai