For people living with diabetes and their families. Guidance changes, so check current local recommendations.
COVID-19 has moved from an unfamiliar emergency to an ongoing respiratory infection, but it has not become irrelevant for people with diabetes. Diabetes is associated with a higher risk of severe illness, and infection can make glucose management difficult. Vaccines, testing and treatments have also changed over time, which makes old social-media advice particularly unreliable.
Quick answer
People with diabetes should discuss current COVID-19 vaccination with a clinician or pharmacist, use a written diabetes sick-day plan, and seek prompt medical advice after a positive test or compatible symptoms. In the United States, the 2026-2027 recommendation varies by age, immune status and clinical circumstances; diabetes is recognised as a risk factor for severe COVID-19. Prescription antiviral treatment is time-sensitive and depends on age, risk, kidney or liver function, pregnancy and medicine interactions. Do not stop insulin, start someone else’s treatment or rely on supplements.
Key points
- Current vaccine schedules may differ from earlier years and by country.
- Early treatment can reduce progression for eligible higher-risk people.
- Illness may raise or lower glucose and can increase ketone risk.
- A negative early test does not always exclude infection; follow current testing advice.
Why diabetes changes the risk conversation
Type 1 and type 2 diabetes are both recognised risk factors for severe COVID-19 in many clinical frameworks. Risk is also influenced by age, vaccination, glucose management, kidney or heart disease, obesity, pregnancy and immune status. It is therefore more useful to assess the whole person than to treat diabetes as a single fixed level of risk.
COVID-19 can reduce appetite, cause fever and dehydration, and trigger stress hormones. Some treatments can interact with common medicines. That is why early contact with a clinician or pharmacist matters.
Vaccination in 2026-2027
Current US CDC guidance recommends a 2026-2027 COVID-19 vaccine for adults aged 18 years and older. It also recommends vaccination for children aged 6 months to 17 years who are moderately or severely immunocompromised; for other children in this age group, the decision is made with a healthcare professional. The schedule depends on age, vaccination history and immune status, and some recommendations fall outside the FDA-approved indication.
Diabetes is included among conditions associated with a higher risk of severe COVID-19, so the risk-benefit discussion is particularly relevant. Other countries use their own schedules and product approvals. Check a current government or health-system source because recommendations and available products can change. A previous infection is part of the discussion but does not automatically settle every future vaccination decision.
What to do after symptoms or a positive test
Contact a healthcare professional early
Ask whether you are eligible for antiviral treatment and how quickly it must begin. Provide a full medication list, including supplements. Some antiviral medicines have important interactions, and kidney or liver function can affect the choice.
Follow your diabetes sick-day plan
Continue insulin unless specifically told otherwise. Check glucose and ketones at the frequency set out in your plan. People taking SGLT2 inhibitors need individual sick-day advice because ketoacidosis can sometimes occur without extremely high glucose.
Maintain fluids and tolerable nutrition
Take small, frequent fluids if appetite is poor. Your plan should include options with and without carbohydrate so you can respond to glucose and food intake. Seek advice if you cannot keep fluids down.
Protect others where possible
Follow current local advice on staying home, masking, ventilation and returning to work or school. These rules can change according to circulating variants and public-health policy.
Avoid outdated or unsafe shortcuts
Antibiotics do not treat the virus. Ivermectin and unapproved products should not be used outside appropriate clinical care. High-dose vitamins are not substitutes for vaccination or antiviral treatment. Do not use oxygen, steroids or prescription medicines borrowed from another person.
A step-by-step home scenario
If a home test becomes positive in the morning, write down when symptoms began because treatment windows are measured from symptom onset. Check glucose, temperature and, if your plan advises it, ketones. Gather your medication list before calling; include inhalers, contraception, anticoagulants, cholesterol tablets, supplements and any recently stopped medicines.
Ask the clinician four direct questions: Am I eligible for treatment? Does kidney or liver function affect the choice? Which interactions need managing? What diabetes readings or symptoms should trigger urgent review? If a medicine must be paused or adjusted, ask for the instruction and restart plan in writing.
Set up a simple monitoring page rather than relying on memory. Record fluids, food, urine output, glucose, ketones, temperature, symptoms and doses taken. This can reveal deterioration and gives a clinician useful information if you need another call. It also reduces duplicate dosing when more than one person is helping.
Plan for isolation without becoming isolated. Arrange delivery of food, glucose supplies or prescriptions. Ask someone to check in at an agreed time. If you care for children or another dependent, decide who can step in if fatigue or breathlessness worsens.
After the acute infection
Return to usual activity gradually. Persistent breathlessness, chest pain, palpitations, severe fatigue, cognitive symptoms or glucose instability deserves assessment. Some people experience symptoms beyond the initial infection, but these have many possible causes; do not assume every new symptom is long COVID without a clinical review.
Replace used sick-day supplies, update the medicine list and note any part of the plan that failed. A post-illness review is especially useful after severe hypoglycaemia, significant ketones, urgent care or hospital admission.
Frequently asked questions
Can COVID-19 raise glucose even if I am not eating?
Yes. Illness hormones can raise glucose, while reduced intake can also cause low glucose depending on treatment. Monitor according to the sick-day plan.
Should I stop metformin or an SGLT2 inhibitor?
Some medicines require temporary review during significant illness or dehydration, but the instructions depend on the medicine and person. Use your written plan or contact a clinician rather than stopping treatment automatically.
Can I take an antiviral with my usual medicines?
Possibly, but interactions must be checked. Give the prescriber or pharmacist a complete list and do not omit over-the-counter or herbal products.
When to get urgent help
Seek urgent care for difficulty breathing, persistent chest pain, new confusion, inability to stay awake, blue or grey lips, severe dehydration, repeated vomiting, severe hypoglycaemia, significant ketones or suspected diabetic ketoacidosis. Use local emergency advice for oxygen readings if you have been instructed to monitor them.
The bottom line
The most useful COVID-19 plan combines a current vaccination decision, early clinical contact, medication-interaction checks and diabetes sick-day rules. Check the latest official schedule when arranging vaccination because recommendations and available products can change.
Related Living Diabetes guides
Sources and further reading
- CDC: 2026-2027 COVID-19 vaccine overview
- CDC: Types of COVID-19 treatment
- CDC: Your immune system and diabetes
- ADA Standards of Care 2026: Comprehensive medical evaluation and immunisations
This article is for general education and does not replace individual medical advice. Local guidance may change.