Common "Covid-19 Vaccines" queries answered by top doctors | iCliniq

Covid-19 Vaccines

COVID-19 vaccines protect people from coronavirus disease. There are four types of vaccines at present. They are categorized as viral vector, nucleic acid (RNA and DNA), whole virus, and protein subunit. Though vaccines offer significant protection against the disease, chances of breakthrough infections are increasing. These vaccines are administered intramuscularly. Pain at the injection site, fever, muscle pain, etc., are its side effects in some people. Pfizer, Moderna, Covaxin, Sputnik, AstraZeneca, Johnson and Johnson's Janssen, Sinopharm, Novavax, Sinovac, etc., are some available approved COVID-19 vaccines.

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All the answers published in this website are written by verified medical doctors, therapists and health experts. The Content has been moderated by iCliniq medical review team before publication. Post your medical clarifications on iCliniq by choosing the right specialty and get them answered. Your medical queries will be answered 24/7 by top doctors from iCliniq.

Is the efficacy higher if the gap between two COVID shots is increased?

Query: Hi doctor, I heard that the second dose of AstraZeneca vaccine taken 12 to 16 weeks apart gives an efficacy of 90%. In contrast, four to six weeks offers only 79%. But one remains exposed to the virus for three months with 40 to 50% higher risk than with 4 to 6% as only one dose gives protection of...  Read Full »


Dr. Shubadeep Debabrata Sinha

Answer: Hi, Welcome to icliniq.com. I will go by what is approved. The gap between the first and second dose is four weeks for most vaccines except Sputnik, where it is 21 days. Studies have concluded that increasing the gap to six to eight weeks between the first and second dose increases antibody prod...  Read Full »

Why is my arm sore after getting the COVID vaccine?

Query: Hi doctor,It has been 12 days since the second dose of Covaxin vaccination, and I have pain extending from arm to neck. Why is this, and what to do? Please help me.  Read Full »


Dr. Muhammad Zubayer Alam

Answer: Hi, Welcome to icliniq.com. Thank you for the query. I can understand your concern. According to your statement, you have been suffering from pain that radiates from arm to neck. Arm pain is a common side effect of the COVID vaccine. Some may have soreness, and others may have shooting pain like ...  Read Full »

Can I take the Hepatitis B vaccine along with the COVID vaccine?

Query: Hi doctor, I have to take a Hepatitis B vaccine for traveling abroad. I also have a slot booked for the Covishield vaccine. Is it fine to take the Hepatitis B vaccine if I take the COVID-19 vaccine? What is the duration of the gap between these two vaccines?  Read Full »


Dr. Muhammad Zubayer Alam

Answer: Hi, Welcome to icliniq.com. Thank you for the query. I can understand your concern. According to your statement, you have to take the Hepatitis B vaccine for traveling abroad. You also have to take the Covishield vaccine for the COVID-19 virus too. There is no evidence to suggest that the COVID-1...  Read Full »

Are elevated levels of D-dimer after a surgery alarming?

Query: Hello doctor,I am 51 years old. A month ago, I had a bone graft membrane implant on my jaw, and I am recovering. I was planning to get vaccinated for COVID-19, and I had some blood tests done before the vaccination. My D-dimer is 5000. Should I be very alarmed? Can it be a result of a post-surgery?T...  Read Full »


Dr. Muhammad Zubayer Alam

Answer: Hi, Welcome to icliniq.com. Thanks for the query. I can understand your concern. According to your statement, you had a history of bone graft membrane implant on your jaw. You have done some blood tests, and your D-dimer has shown 2282.69 µg/mL, and that is very high. Elevated D-dimer usually ma...  Read Full »

Should Aspirin be stopped before taking the COVID-19 vaccine?

Query: Hello doctor, Should I stop Aspirin tablets for COVID vaccination?  Read Full »


Dr. Muhammad Zohaib Siddiq

Answer: Hi, Welcome to icliniq.com. There is no need to stop Aspirin for COVID-19 (Coronavirus disease 2019) vaccination if Aspirin is being taken for secondary prevention of ischemic events. Please tell me why are you taking Aspirin? What other medicines are you taking? Any previous cardiac issue?  Read Full »

Can COVID vaccine be given to patients who are on Clopidogrel?

Query: Hello doctor, My dad is 74 years old and has been diabetic for 30 years. Below is a summary of his other conditions. He had MI and CABG a few years back. Hemorrhage in temporal and occipital lobe after Lomarin (administered for occlusion in the arm). Intermittent hyperkalemia. He has been in good he...  Read Full »


Dr. Muhammad Zohaib Siddiq

Answer: Hello, Welcome to icliniq.com. Thanks for the query. There is no contraindication for Covishield with Clopidogrel. Those with an acute illness should not get the vaccine. One should get 6 to 8 weeks of complete recovery. If he is in good health, he can receive. Stable cardiac patients can get this...  Read Full »

Can I get my second shot of COVID vaccine when I am having an increase in PVCs?

Query: Hello doctor, I have had a very large increase in PVCs for the past few weeks. They happen mostly after I eat or when I am hungry. I suffer from health anxiety, so I cannot focus on anything else when I get something. I have a holter monitor set for this Friday, thankfully, then seeing the cardiolo...  Read Full »


Dr. Prashant Valecha

Answer: Hi, Welcome to icliniq.com. It can be due to some hyperdynamic state like thyroid dysfunction or anemia, or it can be idiopathic. Any other structural cause can be ruled out on an echo. If your first shot of vaccine was uneventful, then go-ahead for the second. Beta-blockers can help in PVCs.  Read Full »

Can I get the COVID vaccine as I have a food allergy?

Query: Hello doctor, I am a 48-year-old female. My height is 5'3, and my weight is 119.05 pounds. My symptoms are hives, itchiness, and sleeplessness. I used Zyrtec and Aquasoft moisturizing lotion. After a mosquito bite, hives are formed, and now without mosquito bites, also I had hives and itchiness. I s...  Read Full »


Dr. Jebin Abraham

Answer: Hello, Welcome to icliniq.com. Thanks for contacting us. Hives can be triggered by a variety of insults. A detailed history and check-up will be needed to find out the exact cause of the same. Apart from mosquito bites, food, clothes, other insects, etc., can cause hives. Some medicines can also c...  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 icliniq.com. 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 normal to get chills and fever after vaccination?

Query: Hi doctor, I got vaccinated yesterday morning, and in the evening, I got chills and fever, and today whole body is tired. I am also a diabetic patient. Can you please tell me what to do and what to eat?  Read Full »


Dr. Padmapriya Kallingiam Vasudevan

Answer: Hi, Welcome to icliniq.com. I am glad you got your shot. Do not worry. It is a normal immune response to feel slight tiredness and have a slight fever and body ache. 1) Please go ahead and take tablet Tylenol 500 mg (Acetaminophen) every six hours as needed for your body ache and fever. 2) Drink...  Read Full »

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