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FAQs – Coronavirus (COVID-19) and Smoking

We answer commonly asked questions about COVID-19 and smoking.

Key points:

  • People who smoke are generally at higher risk of respiratory tract infections.
  • People who currently smoke and who have previously smoked  may be more likely to have severe COVID-19 disease compared to someone who has never smoked. 
  • People with poor lung health and other conditions like cardiovascular disease and cancer (which can be caused by smoking) are also at higher risk of more severe COVID-19 disease. 
  • It’s not clear for how long a person needs to stop smoking to reduce their risk.
  • People who smoke do not have a higher chance of blood clots after receiving the COVID-19 AstraZeneca vaccine compared to people who do not smoke. 
  • It’s important to remember stopping smoking has many health benefits, even beyond a link with COVID-19, so it’s always a good time to quit. Quitline continues to be available to offer support.

For handy tips and tools to help you stop smoking, visit the Quit Tips Hub.

Q. Are people who currently smoke at higher risk of COVID-19?

It's not clear if people who currently smoke are more likely to get COVID-19. But we do know that they are at a higher risk of getting respiratory infections in general.

The hand-to-mouth action of smoking and e-cigarette use may also mean people who smoke are more vulnerable to COVID-19. This is because they are touching their face and mouth more often.

It’s also possible aerosols may spread the virus. This means that tobacco smoke and e-cigarette aerosols could transmit the virus (in the air and as they settle on surfaces), but more research is needed.

Sharing any type of tobacco or smoking product (for example, cigarettes, e-cigarettes or shisha/waterpipes) can also increase the risk of spreading COVID-19. 

Q. Are people who smoke more likely to have severe complications if they do get COVID-19?

There is some evidence that people who smoke may be more severely affected by COVID-19. This may be because smoking damages the lungs so they don’t work as well. For example, lungs naturally produce mucus, but people who smoke have more and thicker mucus that is hard to clean out of the lungs. This mucus clogs the lungs and is prone to becoming infected. Smoking also affects the immune system, making it harder to fight infection.

There is also evidence that people with other health conditions (like cardiovascular disease and cancer) are more likely to have more severe COVID-19 disease. Smoking increases the risk of many of these conditions.

Q. What if I previously smoked?

People who have previously smoked might also be at higher risk of severe COVID-19 complications. It’s not known for how long someone needs to have quit to have the same level of risk as someone who has never smoked.

The good news is that when people stop smoking, there are immediate health benefits. For example, the lungs start to heal quickly. Breathing improves as the lungs get better at clearing mucus and other particles.

Q. For how long do people have to stop smoking to reduce their risk of COVID-19 and possible complications?

This is not currently known for COVID-19 specifically. But stopping smoking improves lung health within a few months. Rates of lung infections like bronchitis and pneumonia also decrease.

If you’re still trying to quit (or even if you have recently quit), there are other things you can do to protect yourself and others. Talk to your doctor or pharmacist about getting the flu shot for both you and your family. Also avoid exposing people around you to second hand smoke.

Q. Are people who smoke more likely to get blood clots after receiving the COVID-19 AstraZeneca vaccine?

No, people who smoke are not more likely to get blood clots after receiving the AstraZeneca vaccine compared to people who do not smoke.

The blood clots associated with the AstraZeneca vaccine are called Thrombosis with Thrombocytopenia Syndrome (TTS), and smoking is not a risk factor for TTS. Although it is well known that smoking causes sticky blood, which can lead to the formation of blood clots, TTS has a different mechanism, and they are not related.  

Q. Is it still safe to start, or continue to use, stop smoking medications such as nicotine replacement therapy (NRT) or prescribed stop smoking tablets?

For people who smoke, stop smoking medications can help to reduce cravings and feelings of nicotine withdrawal. Tailored support from Quitline (13 7848) plus these medications give people the best chance of quitting successfully.

There is no evidence that COVID-19 has an impact on the safety of these medications. If you are already using these medications, it is safe to continue to do so, as instructed by your doctor. If you are thinking about starting these medications, it is best to first speak with your doctor or pharmacist.

Remember to wash your hands before you use any type of stop smoking medication, just as you would before handling food.

Q. How can I tell the difference between nicotine withdrawal symptoms and COVID-19 symptoms?

People who have recently stopped smoking may experience cravings and feelings of nicotine withdrawal. These can include disturbed sleep, irritability, and difficulty concentrating. These symptoms are usually temporary and disappear after about 2 to 4 weeks. 

Other symptoms of nicotine withdrawal might include a cough and sore throat. These are less common and are usually also temporary. Nicotine withdrawal symptoms may be confused with the symptoms of COVID-19. It’s important to remember that fever isn’t a symptom of nicotine withdrawal.  

It’s best to speak to your doctor or call the coronavirus hotline if you are worried you may have COVID-19.

For more information about nicotine withdrawal, visit:

Q. Where can I get the best support to stop smoking?

The best thing you can do for your health is to stop smoking. The best way to stop smoking is to use Quitline 13 7848, plus stop smoking medications, for instance nicotine patches and gum. Quitline counsellors are available Mon – Friday 8am – 8pm and provide personalised, non-judgmental support to help you quit.

Quitline is an inclusive and culturally safe space for all, including the LGBTIQA+ community. There is also an Aboriginal Quitline for people who smoke identifying as Aboriginal and Torres Strait Islander. To access Aboriginal Quitline, call 13 7848 and ask to speak with one of our friendly Aboriginal Quitline counsellors. We also have an interpreter service available if you speak a language other than English.

Explore our website at for more info, tips and tools to help you, whether or not you're ready to quit.

Useful links

Further general information about COVID can be found on Healthdirect Australia:

Last updated January 2022.

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