TORONTO -- As COVID-19 vaccines are being rolled out across the country, infectious disease specialist Dr. Abdu Sharkawy weighs in on some 鈥榙os and don鈥檛s鈥 as well as other questions Canadians may have about getting the shot.

Here are some of the things you should do:

DO GET THE VACCINE WHEN IT鈥橲 YOUR TURN

Vaccine rollout varies from province to province, and as supply chains may become interrupted, it is important to continually check with your local and provincial health authorities when it is your turn to get the COVID-19 vaccine.

Provinces and territories have online guides outlining the phases of their vaccine rollouts.

The day of your shot, it is recommended by health organizations, , to follow your normal routine, wear loose-fitting clothing so the health care provider can easily access your arm and to eat meals as usual.

You should bring your health card and another government-issued photo ID card, your mask, and immunization records 鈥 as well as any supportive items or personnel you may need, like glasses, hearing aids or an interpreter, the ministry says.

Sharkawy said he would 鈥渄efinitely recommend pre-medicating鈥 with something like acetaminophen, in a telephone interview with CTVNews.ca Friday.

鈥淚 think that people should anticipate that it will be more painful than a typical influenza vaccine and more so than most routine vaccines like tetanus鈥 so prepare for some greater discomfort in your arm,鈥 he said.

Sharkawy said to take Tylenol, for example, about half an hour before getting the vaccine and to take another dose about half an hour afterwards, and then again at night if needed.

鈥淭he other things that I found very useful is to actually ice the affected arm because there is actually a little bit of swelling that is around the inoculation site that will respond to some ice,鈥 he said.

As the elderly and those with higher risk factors are among the first Canadians receiving vaccines, Sharkawy stressed that people should also make sure to take all their prescribed medication as usual.

鈥淭here should be absolutely no interaction between the vaccine and any prescribed medications,鈥 he said.

Sharkawy added that, even though it is a 鈥減oint of some controversy,鈥 he would 鈥渃aution against鈥 Canadians turning to ibuprofen such as Advil and Motrin, or non-steroidal anti-inflammatory drugs.

鈥淭hey may be very effective for pain control, [but] there is a theoretical risk that those medications may actually hinder or impair an optimal immune response to the vaccine,鈥 he explained.

SHOULD I GET VACCINATED EVEN IF I鈥橵E HAD COVID-19?

This question falls into something Sharkawy calls a 鈥渞isk-stratified decision.鈥

鈥淭his is a decision that needs to be individualised, it should be discussed with your health care provider, and there should not be a blanket policy that says everyone who has had COVID-19 and survived it should still receive the vaccine,鈥 he said, citing the ethical issues around vaccine supply and prioritising those who have had no exposure or immunity.

鈥淲hat I mean by that is theoretically, if you have had COVID-19 and you have a relatively normal immune system and you've recovered from it, you should develop antibodies within about three months after you have been infected. So the concept is, if you are likely to be naturally immune, is it actually essential for you to get the vaccine? And that may not be necessarily true,鈥 he said.

However, the way to prove natural antibodies and immunity lies with antibody testing, which is 鈥渘ot widely available,鈥 Sharkawy said.

He also pointed out that there is a 鈥渟mall but not negligible鈥 chance Canadians could become re-infected with the coronavirus, and therefore it is reasonable to consider getting vaccinated even if you have had COVID-19 鈥 but stressed the choice is an individual one.

DO TELL STAFF ABOUT ANY ALLERGIES OR PAST ALLERGIC REACTIONS

While it may seem obvious answer to some, Sharkawy said it is 鈥渁bsolutely鈥 essential to tell those administering the vaccines about any allergies or past allergic reactions.

鈥淭he reassuring point is that in the vast majority of cases, whether it鈥檚 prescription medication or environmental allergies, there鈥檚 actually very little relevance or change in the likelihood of an actual adverse reaction to the vaccine itself,鈥 he said.

Sharkawy explained the components that are likely to be allergenic within the vaccine are, 鈥渋n the majority of cases, entirely unrelated to individual allergies.鈥

鈥淚f somebody has a serious allergy history of any sort, it's important to alert the staff so that they can be monitored perhaps more carefully,鈥 he said. 鈥淚f they need an EpiPen for some reason or they've had anaphylactic reactions that are serious to do other exposures, it's worth taking note of this to monitor them more carefully.鈥

DO GET YOUR SECOND VACCINE DOSE WITHIN THE RECOMMENDED TIME FRAME

Again citing the ebb and flow of vaccine supply chains and possible interruptions, Sharkawy said that vaccine efficacy data is based on the schedule between doses.

The Pfizer vaccine has a schedule of 21 days between doses, and 28 for the Moderna vaccine. However, the panel of medical experts advising the federal government on vaccination said on March 3 that the second dose of COVID-19 vaccines can be given up to four months after the first, if Canada wants to maximize the number of people being immunized.

Canada's National Advisory Committee on Immunization (NACI) issued new guidance advising that the window between shots for all three of the currently approved vaccines鈥擯fizer-BioNTech, Moderna, and AstraZeneca鈥攃an now be considerably extended, while still being effective.

On April 27, Dr. Theresa Tam, Canada's chief public health officer, reiterated that a single dose of vaccine offers "very good protection" against serious illness and deaths from COVID-19, according to evidence taken from "real-life data." But it's still not as strong as a second dose for those immunized with a vaccine requiring a second dose. That second dose "will provide increased protection and also increased duration of the protection," said Tam.

NACI's guidelines are not set rules, however, so check the dosage timelines in your province or region.

DO CONTINUE WEARING MASKS AND PHYSICAL DISTANCING AFTER GETTING VACCINATED

Sharkawy said continuing public health guidance after getting vaccinated is important, as 鈥測ou don鈥檛 constitute your immunity overnight,鈥 he said. 鈥淓ven after the first shot there's not full immunity constituted even in the healthiest of hosts.鈥

Sharkawy pointed out that it , and within that period of time, there is 鈥渁mple opportunity to not only become infected with COVID-19, but to transmit it to someone else thereafter unknowingly.鈥

Sharkawy reiterated that proving immunity through methods like antibody testing is not well established as 鈥渨e don鈥檛 have an infrastructure for wide scale antibody testing that has been validated on any evidence-based measure.鈥

鈥淭herefore, we can't say without a shadow of a doubt that even after becoming vaccinated, even鈥 a month or two later, that you are free and clear,鈥 he said.

Sharkawy said the best measure of success will be a low rate of community transmission of COVID-19.

鈥淯ntil we're very close to that point in time or have achieved that, we're going to require everybody to maintain public health measures as a point of absolute safety and out of an abundance of caution to prevent any harm.鈥

Here are some things you should not do related to getting a COVID-19 vaccine:

DON'T LET MISINFORMATION CLOUD YOUR JUDGMENT ON GETTING VACCINATED

The World Health Organization said the rampant COVID-19-related misinformation was extreme enough to warrant being classified as an 鈥渋nfodemic,鈥 and launched the United Nations Communications Response Initiative in April 2020 to combat it. 

In Canada, a nationwide coalition of scientists has banded together to fight misinformation at its source on social media

鈥淯nfortunately, there is a myriad of sources based on a lot of different agendas that may be anti-science鈥r related to a lot of narratives that are sadly not very evidence based,鈥 Sharkawy said.

Sharkawy said he would caution against people getting information from sources that have had 鈥渁 history of campaigning against vaccines in general.鈥

鈥淚 would caution against any adopting of viewpoints related to those that have diminished the importance of COVID-19, or has trivialised it,鈥 he said, adding that those are clearly sources with 鈥渁n agenda in mind.鈥

鈥淚 think [those sources] diminish the true threat of this virus that has killed millions of people around the world鈥hat鈥檚 irrefutable,鈥 he said.

Sharkawy鈥檚 advice for Canadians is to rigorously vet their sources of information, and to make sure they have a 鈥渉istory of speaking from a point of informed opinion that is based on evidence鈥 not through simple opinion.鈥

鈥淪peak to someone in the medical establishment you trust,鈥 he urged.

DON鈥橳 GET THE VACCINE IF YOU CURRENTLY HAVE COVID-19 OR HAVE BEEN EXPOSED

Going to get a vaccine while infected with COVID-19 could not only expose others waiting for their shot to the virus, but as Sharkawy pointed out, it could also affect you personally.

鈥淚f you currently have COVID-19 and are still within the acute phase鈥 there is the possibility of potentially having a bad adverse reaction by triggering your immune system erroneously or adversely if you are in the throes of an acute infection,鈥 he said.

Sharkawy added that if Canadians have 鈥渁ny acute infection,鈥 they should not be receiving the vaccine or 鈥渁lmost any vaccine鈥 because the likelihood of a benefit is 鈥済reatly diminished.鈥

IS IT OK TO GET OTHER VACCINES AFTER THE COVID-19 VACCINE?

The says to wait 鈥渁t least 14 days before getting another vaccine, such as the flu or shingles shot, if you got your COVID-19 vaccine first,鈥 and that if you get another vaccine before your COVID-19 shot, to wait at least 14 days before getting your COVID-19 vaccination.

However, the site notes that 鈥渨hen more data becomes available鈥 they may update their recommendations.

Sharkawy said it may be best to avoid getting other vaccinations out of caution, but to 鈥済o ahead鈥 for situations like a needle stick injury, which may require vaccinating against tetanus or Hepatitis B.

鈥淭he benefits certainly outweigh the risks,鈥 he said, adding that getting a tetanus shot 鈥渟hould not鈥 affect the efficacy of a COVID-19 vaccine.

DO NOT LEAVE THE VACCINATION SITE RIGHT AFTER YOUR SHOT

Similar to when donating blood, most vaccination sites will ask patients to wait after receiving their shot to monitor their reaction.

鈥淓verybody reacts a little differently to vaccines and needles,鈥 Sharkawy explained. 鈥淭here is a small but distinct possibility you may become light-headed, and especially if you're driving, you want to ensure that you feel entirely safe and that you are cognitively intact and that there's no likelihood that you could do anything that would put yourself or anyone on the road in danger.鈥

Sharkawy urged Canadians to be patient.

鈥淭ake that time to escape mentally, take a few deep breaths, read something and enjoy your prospect of new found immunity without taking any liberties.鈥

With files from Rachel Aiello