Covishield is a vaccine against COVID-19 (Coronavirus Disease 2019), also known as the AstraZeneca vaccine. It is given intramuscularly. The gap between two doses of this vaccine is 12 to 16 weeks in adults. The common side effects are pain at the injected site, headache, tiredness, fever, and muscle ache.

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Why does my 80-year-old father has low levels of antibody even after two doses of COVID vaccine?

Query: Hello, My 80-year-old father has received two doses of the Covishield vaccine in a gap of 5.5 weeks. He received his second dose last month. We did the antibody test. His antibodies are only 1.4, while for my mother, it is 20. They both received the doses on the same day. Does this mean he has low ...  Read Full »

Dr. Sugreev Singh

Answer: Hi, Welcome to Thank you for writing, and I understand your concern. Low values mean that your father does not currently have an active COVID infection. However, they both had exposure previously, so antibodies are formed, which is why the antibody test is positive. Your mother had mo...  Read Full »

Is there a chance of re-infection with Omicron if I have a mild fever and tiredness for a week?

Query: Hi doctor,I am 28 years old, and my weight is 92 kg. I have had a mild fever of 99.3 °F for the last week. I also have extreme tiredness and anxiety due to being re-infected with Omicron. I was affected already by Omicron two months back. Kindly help.  Read Full »

Dr. Basuki Nath Bhagat

Answer: Hello,Welcome to understand your concern. I would like to know what symptoms you are having at present?Kindly revert in case of further queries.Thank you.  Read Full »

Will I have constipation post-COVID vaccination?

Query: Hi doctor, I need quick information regarding my current issue. I had taken the first dose of the Covishield vaccine last Friday at a government center. I had a feverish kind of feeling for one and a half days and got well by now. But I started to have constipation since then. The number of bowel ...  Read Full »

Dr. Anshul Varshney

Answer: Hi, Welcome to This problem is not at all linked to Covishield. I congratulate you on getting an opportunity to get a coronavirus vaccination. You are probably suffering from hemorrhoids, and that is the reason behind your constipation as well as getting blood in the stool. I sug...  Read Full »

What is the expected level of antibodies after a COVID vaccine?

Query: Hi doctor, I did the antibody test after two doses of the AstraZeneca vaccine at a gap of 5.5 weeks. The second dose was before 6 weeks. I want to get my report evaluated. What is the range for antibodies? Thank you.  Read Full »

Dr. Mohammad Rajja

Answer: Hello, Welcome to You have an antibody IgG (immunoglobulin G) value of 13.52 U/mL, which means you have enough antibodies to fight COVID. Now you are protected from COVID. Check again after five months and get the third shot after getting antibody reports. As of now, you do not need...  Read Full »

Is it possible to develop an allergic reaction even after 12 hours of vaccination?

Query: Hello doctor, My brother had a high fever, sweat, difficulty breathing, and dizziness 12 hours after the AstraZeneca vaccine and had to rush to the hospital. Can he get the second dose?  Read Full »

Dr. Jebin Abraham

Answer: Hi, Welcome to Are you sure it is due to the vaccine? Since it is a late-onset reaction, make sure there is no other cause. Did he have any other allergies like drugs or food? If you believe that it was related to the vaccine, do not take a second dose. It may be a late-onset reaction...  Read Full »

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