Thank you for the question.
Mr. Chair, this is an area of ongoing scientific studies. Variants actually also differ in the amount of immunity that they confer. For example, we do know that those who just got the infection and haven't been vaccinated are not as well protected as those who got two doses of vaccine, for example, and then subsequently got an infection.
The omicron virus variant is also under study at the moment. There is certainly some preliminary data showing that the immunity conferred by this variant varies from person to person. That is why the National Advisory Committee on Immunization still essentially recommends vaccination, even if you have had COVID-19 or if you think you got infected, after a suitable time period, depending on whether you're looking at the primary series or a booster dose, for example. Those who got infected just recently can wait three months before getting their booster shot because of this variability we're seeing in infection-conferred immunity.