Should you get the COVID-19 vaccine if you are unwell?
Emma Payne
Published Jan 15, 2026
Should you get the COVID-19 vaccine if you are unwell?
People currently unwell and experiencing COVID-19 symptoms should not receive the COVID-19 vaccine until they have recovered.
You can have the vaccine 28 days after you had a positive test for COVID-19 or 28 days after your symptoms started, so you may need to wait.
How do I know if Im clinically vulnerable for COVID-19?
You may previously have received a letter or email identifying you as someone who is clinically extremely vulnerable ( CEV ), and you may have been advised to shield during earlier stages of the pandemic.
Can I get COVID-19 or other infections even if I am vaccinated?
Vaccinations are very effective at preventing serious illness from COVID-19, however even if you are vaccinated there is a chance you might catch COVID-19 or another respiratory infection and pass it on to other people.
Can you still get Covid after vaccine?
Like all medicines, no vaccine is completely effective, so you should continue to take recommended precautions to avoid infection. Some people may still get COVID-19 despite having a vaccination, but this should be less severe.
What are the common side effects of the COVID-19 vaccine?
Common side effects
- having a painful, heavy feeling and tenderness in the arm where you had your injection. This tends to be worst around 1 to 2 days after the vaccination
- feeling tired
- headache
- general aches, or mild flu like symptoms
What should I do if I have COVID-19 vaccine side effects?
Most side effects are mild or moderate and go away within a few days of appearing. If side effects such as pain and/or fever are troublesome, they can be treated by medicines for pain and fever such as paracetamol.
Can you get a fever or temperature after the COVID-19 vaccine?
Although a fever can occur within a day or two of vaccination, if you have any other COVID-19 symptoms or your fever lasts longer, stay at home and arrange to have a test.
Can you catch COVID-19 after 2 doses of vaccines?
Although 2 doses of vaccine will greatly reduce your own risk of becoming unwell with COVID-19, it is still possible to contract the virus and pass it to others.
Can I develop immunity to COVID-19 after testing positive for PCR?
If you have previously tested positive for COVID-19, you will probably have developed some immunity to the disease. However, it cannot be guaranteed that everyone will develop immunity, or how long it will last. It is possible for PCR tests to remain positive for some time after COVID-19 infection.
How long after having COVID-19 can I get the spring booster vaccine?
If you are unwell, wait until you have recovered to have your vaccine. If you have had confirmed COVID-19 you should ideally wait 4 weeks before having your spring booster.
Does BCG vaccine protect you from getting the coronavirus disease?
There is no evidence that the Bacille Calmette-Guérin vaccine (BCG) protects people against infection with COVID-19 virus. Two clinical trials addressing this question are underway, and WHO will evaluate the evidence when it is available. In the absence of evidence, WHO does not recommend BCG vaccination for the prevention of COVID-19. WHO continues to recommend neonatal BCG vaccination in countries or settings with a high incidence of tuberculosis.
Can you go back to daily activities after having your COVID-19 vaccine?
You should be able to resume activities that are normal for you as long as you feel well. If your arm is particularly sore, you may find heavy lifting difficult. If you feel unwell or very tired you should rest and avoid operating machinery or driving.
What are the organs most affected by COVID‐19?
The lungs are the organs most affected by COVID‐19
Who are at higher risk of developing serious illness from COVID-19?
Older people, and those with underlying medical problems like cardiovascular disease, diabetes, chronic respiratory disease, and cancer are more likely to develop serious illness.
Who can get a spring booster for the coronavirus disease?
People aged 75 years and older, residents in care homes for older people, and those with weakened immune systems will be offered a spring booster of coronavirus (COVID-19) vaccine. Appointments will be available from the National Booking Service shortly.
Does obesity put me at high risk for COVID-19?
Living with excess weight puts people at greater risk of serious illness or death from COVID-19, with risk growing substantially as body mass index (BMI) increases. Nearly 8% of critically ill patients with COVID-19 in intensive care units have been morbidly obese, compared with 2.9% of the general population.
How long do I have to wait for my booster after having COVID-19?
If you have a COVID-19 positive result, when can you have a booster? You will still need the booster but you should wait at least 4 weeks from your COVID-19 infection.
Are COVID-19 tests 100% reliable?
No test is 100% reliable, even those who meet regulatory standards for performance and safety. The results are also only relevant to that sample at that point in time.
Can I take a PCR test to post office while isolating for COVID-19?
You must not enter any post office with your test kit.
How does the AstraZeneca COVID-19 vaccine work?
COVID-19 Vaccine AstraZeneca stimulates the body's natural defences (immune system). It causes the body to produce its own protection (antibodies) against the virus. This will help to protect you against COVID-19 in the future. None of the ingredients in this vaccine can cause COVID-19.
What does a negative COVID-19 antibody test result mean?
A negative result means the test did not detect COVID-19 antibodies.
How far apart should you wait between the doses of the Oxford COVID-19 vaccine?
The MHRA authorisation includes conditions that the AstraZeneca (Oxford) vaccine should be administered in 2 doses, with the second dose given between 4 and 12 weeks after the first.
What are some common side effects of the COVID-19 vaccine in children?
Common side effects their arm feeling heavy or sore where they had the injection feeling achy or like they have the flu feeling tired having a headache
What are the possible side effects of the BNT162b2 COVID-19 vaccine?
The most common side effects with BNT162b2 (which may affect more than 1 in 10 people) were pain at the injection site, tiredness, headache, muscle pain, chills, joint pain and fever.
Is temperature check a reliable way to detect coronavirus disease?
There is little scientific evidence to support temperature screening as a reliable method for detection of COVID-19 or other febrile illness, especially if used as the main method of testing.
Temperature readings from temperature screening systems will measure skin temperature rather than core body temperature. In either case, natural fluctuations in temperature can occur among healthy individuals. These readings are therefore an unreliable measure for detection of COVID-19 or other diseases which may cause fever. Furthermore, infected people who do not develop a fever or who do not show any symptoms would not be detected by a temperature reading and could be more likely to unknowingly spread the virus.