Vaccinations During Pregnancy Latest Guidelines Safety and Benefits for Mother and Baby
Pregnancy changes the immune system, heart, and lungs in ways that can make some infections more severe. A mild fever or cough may pass quickly for one person, yet the same infection during pregnancy can raise the risk of complications such as pneumonia, preterm birth, low birth weight, or serious illness in a newborn.
That is why vaccination is part of routine antenatal care, not an optional extra. The aim is simple: protect the pregnant person during a vulnerable period and pass protective antibodies to the baby before birth.
Guidelines continue to evolve as new evidence emerges, especially for COVID-19 and RSV. This guide explains the current thinking on VACCINATIONS DURING PREGNANCY, which vaccines are commonly recommended, when they are usually given, and how to think through common safety concerns.
This article is for general information only. Personal vaccine decisions should be made with an obstetrician, family physician, or qualified healthcare provider who knows the pregnancy history.
Why vaccination matters during pregnancy
Vaccines help the immune system recognise a germ before it causes serious disease. During pregnancy, the benefits often work in two directions.
The pregnant person gains protection against infections that can become more severe during pregnancy. The baby also benefits because antibodies cross the placenta, especially in the later part of pregnancy. These antibodies can help protect the newborn during the first weeks or months of life, before the baby can receive some vaccines directly.
This is especially relevant for illnesses such as whooping cough, flu, COVID-19, and tetanus.
The World Health Organization, the US Centers for Disease Control and Prevention, the American College of Obstetricians and Gynecologists, and professional bodies in India support vaccination as a key part of maternal and newborn health. Their recommendations may differ in timing and product availability, but the principle is consistent: the right vaccine at the right time can prevent serious illness.
Research also supports this approach. Studies published over many years have shown that maternal influenza vaccination reduces flu illness in pregnant people and gives early protection to infants. Research on Tdap vaccination has shown strong protection against severe pertussis in young infants. Large safety monitoring studies for COVID-19 vaccination in pregnancy have not found an increased risk of major pregnancy complications compared with unvaccinated groups.
The vaccines most often recommended during pregnancy
Recommendations depend on the country, vaccine availability, prior vaccination history, medical risk, season, and outbreak situation. In India, the national programme focuses strongly on tetanus and diphtheria protection during pregnancy, while private antenatal care may also include influenza, Tdap, COVID-19, hepatitis B, or other vaccines when appropriate.
The table below summarises the main vaccines commonly discussed in antenatal care.
Vaccine | Usual timing in pregnancy | Why it matters | Key safety point |
Tetanus and diphtheria, usually Td under India’s national schedule | As early as possible, with a second dose at least 4 weeks later if needed | Prevents maternal and neonatal tetanus and diphtheria | Inactivated vaccine, widely used in pregnancy |
Tdap, tetanus, diphtheria, and pertussis | Often 27 to 36 weeks, especially where available | Protects the newborn from whooping cough | Inactivated vaccine, recommended by many expert groups |
Influenza vaccine | Any trimester, ideally before or during flu season | Reduces risk of severe flu and protects the baby early in life | Inactivated flu vaccine is used, not the live nasal spray |
COVID-19 vaccine | Any trimester, as advised by current national guidance and risk | Reduces risk of severe COVID-19 and pregnancy complications linked to infection | Large safety data are reassuring |
Hepatitis B vaccine | Any trimester if not immune or at risk | Prevents hepatitis B infection and reduces transmission risk | Non-live vaccine, considered safe when indicated |
RSV vaccine | Usually late pregnancy where approved and available | Helps protect infants from severe RSV disease | Newer recommendation, availability varies by country |
Tetanus, diphtheria, and pertussis protection
Tetanus remains one of the clearest examples of why maternal vaccination matters. Newborn tetanus can be life-threatening, especially when delivery or cord care is unsafe. India has made major progress, but antenatal tetanus protection remains standard care.
Under India’s Universal Immunisation Programme, pregnant people are advised to receive Td according to prior vaccination status. A common schedule is:
Td-1 Given as early as possible in pregnancy.
Td-2 Given at least 4 weeks after the first dose.
Td booster Given if the pregnant person received two Td doses in a previous pregnancy within the recommended time window, commonly within the last 3 years.
Td protects against tetanus and diphtheria. Tdap adds protection against pertussis, also called whooping cough. Pertussis can be dangerous in babies too young to complete their own vaccine series.
Many international guidelines, including CDC and ACOG guidance, recommend Tdap during every pregnancy, usually between 27 and 36 weeks. This timing helps maximise antibody transfer to the baby. In India, Tdap may be discussed in private care settings, particularly where pertussis protection for the newborn is a concern. The choice between Td and Tdap should be guided by the treating doctor and local availability.
Flu vaccination can prevent more than a bad week
Influenza is often dismissed as “just flu”, but pregnancy raises the risk of complications. Flu can cause high fever, dehydration, pneumonia, and hospitalisation. Fever in early pregnancy can also be concerning, especially when severe or untreated.
The inactivated influenza vaccine is recommended by many expert groups during pregnancy. It can be given in any trimester. For best protection, it is often offered before the expected flu season, though timing varies across India because influenza activity can differ by region and season.
The vaccine does not cause flu because it does not contain live flu virus in the injectable inactivated form. Mild soreness, low-grade fever, or fatigue can occur, but these are short-lived for most people.
A major reason to get the flu vaccine during pregnancy is newborn protection. Babies cannot receive flu vaccine immediately after birth, but maternal antibodies can offer early protection.
Maternal vaccination works like a temporary shield for the newborn, covering the gap before the baby’s own vaccines can begin.
COVID-19 vaccination and updated guidance
COVID-19 guidance has changed several times because the virus has changed. The current approach in many countries is to continue recommending COVID-19 vaccination during pregnancy, especially for those at higher risk of severe illness, those with medical conditions, healthcare workers, or those who have not completed recommended doses.
Pregnancy itself increases the risk of severe COVID-19 compared with non-pregnant people of the same age. Infection has also been linked in research to a higher risk of preterm birth and intensive care admission in severe cases.
Large observational studies and vaccine safety monitoring systems, including data reviewed by the CDC and published in major medical journals, have found reassuring safety results for mRNA COVID-19 vaccines during pregnancy. Studies have not shown an increased risk of miscarriage, birth defects, or infertility from vaccination. Protection may also pass to the baby through antibodies.
In India, COVID-19 vaccination recommendations may shift based on government guidance, circulating variants, and vaccine availability. Anyone pregnant and due for a dose should ask their doctor which vaccine is currently advised and whether timing should be adjusted around recent infection.
RSV vaccination is the newest topic to ask about
Respiratory syncytial virus, or RSV, is a common cause of chest infections in babies. For some infants, RSV can lead to bronchiolitis, breathing difficulty, and hospital admission.
A maternal RSV vaccine has been approved in some countries for use in late pregnancy. In the United States, expert guidance recommends Pfizer’s RSVpreF vaccine during a seasonal window for eligible pregnant people, generally between 32 and 36 weeks, to help protect infants after birth. This followed clinical trial data showing reduced severe RSV-related lower respiratory tract disease in infants during early life.
This is a newer area, and availability is not the same everywhere. In India, RSV vaccination during pregnancy is not yet a routine part of the national antenatal schedule. It may not be widely available in all settings.
The practical advice is straightforward: if RSV vaccination is available where care is being received, ask the obstetrician whether it is recommended based on gestational age, season, local guidance, and the baby’s risk factors.
Vaccines that may be needed in special situations
Not every vaccine is routine for every pregnancy. Some are advised only when there is a clear risk.
Hepatitis B vaccine
Hepatitis B can pass from parent to baby during birth. Screening during pregnancy helps identify infection early. If a pregnant person is not immune and has risk factors, hepatitis B vaccination may be recommended.
The vaccine is not live and is considered safe in pregnancy when indicated. If the pregnant person already has hepatitis B, the baby will need timely birth-dose vaccination and, in some cases, hepatitis B immunoglobulin as per medical advice.
Hepatitis A vaccine
Hepatitis A vaccination may be considered during pregnancy for people at high risk, such as those with certain liver conditions or likely exposure through travel or outbreaks. It is not routinely required for everyone.
Rabies vaccine
Rabies is almost always fatal once symptoms begin. If there is a suspected exposure from an animal bite or scratch, rabies vaccination should not be delayed because of pregnancy. Doctors may also recommend rabies immunoglobulin depending on the exposure.
Travel-related vaccines
Some travel vaccines may be advised if travel cannot be postponed and the disease risk is high. These decisions need careful medical review. The risk of infection may sometimes be greater than the theoretical risk of vaccination.
Vaccines usually avoided during pregnancy
Live vaccines are generally avoided during pregnancy because they contain weakened forms of a virus or bacteria. The risk is often theoretical, but guidelines take a cautious approach.
Vaccines usually avoided during pregnancy include:
MMR Protects against measles, mumps, and rubella. It is usually given before pregnancy or after delivery if needed.
Varicella vaccine Protects against chickenpox. It is usually given before pregnancy or after delivery.
Live attenuated influenza nasal spray The injectable inactivated flu vaccine is preferred during pregnancy.
BCG Not typically given during pregnancy.
HPV vaccine Not recommended during pregnancy. If a series has started, remaining doses are usually postponed until after delivery.
If a live vaccine was given before someone realised they were pregnant, it does not usually mean the pregnancy is at risk or needs any drastic action. The next step is to speak with a doctor for documentation and guidance.
Safety concerns and common misconceptions
Vaccine questions during pregnancy deserve respectful, direct answers. Most concerns come from wanting to protect the baby, which is completely understandable.
“Can vaccines cause miscarriage?”
For recommended inactivated vaccines such as influenza, Td, Tdap, hepatitis B, and COVID-19 vaccines, large safety reviews have not shown an increased risk of miscarriage. Miscarriage is sadly common in early pregnancy, so timing can create fear. A miscarriage after vaccination does not mean the vaccine caused it.
“Will vaccination overload the baby’s immune system?”
No. The immune system handles many exposures every day. Vaccines contain carefully selected antigens, and the number of antigens in modern vaccines is small compared with what the body naturally meets through food, air, skin contact, and common infections.
“Are preservatives unsafe during pregnancy?”
Some vaccines contain tiny amounts of preservatives or stabilisers to keep them safe and effective. These ingredients are studied and regulated. If there is a history of allergy to a vaccine component, the doctor may choose a different product or refer to an allergy specialist.
“Is it better to wait until after delivery?”
For some vaccines, waiting means missing the chance to protect the newborn. Tdap is timed in late pregnancy because antibody transfer through the placenta is strongest then. Flu and COVID-19 vaccination also reduce the risk of severe illness during pregnancy itself.
Some vaccines, such as MMR and varicella, are rightly delayed until after delivery. The decision depends on the vaccine type.
“Can vaccines affect fertility?”
Recommended vaccines do not cause infertility. This concern became common during the COVID-19 pandemic, but studies and real-world data have not supported it. Professional bodies such as ACOG and the CDC state that COVID-19 vaccination is recommended for people who are pregnant, planning pregnancy, or breastfeeding, based on available safety evidence.
How to plan vaccination during antenatal care
A good vaccine plan starts early, ideally at the first antenatal visit. Bring any available vaccine records, including childhood records, previous pregnancy records, COVID-19 certificates, and travel vaccine documents.
A doctor may check:
Current week of pregnancy
Previous Td or Tdap doses
Flu season and local outbreak patterns
COVID-19 vaccination history
Hepatitis B screening results
Allergy history
Medical conditions such as diabetes, asthma, heart disease, kidney disease, or immune suppression
Travel plans
Risk of exposure at work or home
Spacing between vaccines is usually simple. Many inactivated vaccines can be given during the same visit at different injection sites, if clinically appropriate. Some people prefer spacing them out to track side effects, but delaying too long can leave a gap in protection.
Mild side effects are common and usually settle quickly. These may include arm pain, tiredness, mild fever, or body ache. Severe allergic reactions are rare but need urgent care. Anyone with breathing difficulty, facial swelling, widespread rash, or fainting after vaccination should seek immediate medical help.
What recent expert guidance tells us
Recent guidance has focused on three major points.
Maternal Tdap remains strongly supported. Expert groups continue to recommend pertussis-containing vaccination in every pregnancy where part of local practice, because it protects babies before their own primary vaccine series is complete.
COVID-19 vaccination continues to be advised for pregnancy protection. Guidance may vary by country and risk group, but expert bodies agree that infection during pregnancy can be serious and that safety data for recommended vaccines are reassuring.
RSV prevention is now part of global discussion. Maternal RSV vaccination and infant monoclonal antibodies are newer tools. Countries are adopting them at different speeds based on approvals, cost, seasonality, and health system planning.
For India, the most reliable approach is to follow the treating obstetrician’s advice along with current Ministry of Health guidance, especially for vaccines included in national programmes.
The practical takeaway
Vaccination during pregnancy protects two lives at once. Some vaccines protect the pregnant person from severe illness. Some protect the baby during the fragile newborn period. Many do both.
The core vaccines to discuss at antenatal visits are Td or Tdap, influenza, COVID-19, and hepatitis B when indicated. RSV vaccination may also be relevant where approved and available. Live vaccines such as MMR and varicella are usually planned before pregnancy or after delivery.
The best next step is simple: take vaccine records to the next antenatal appointment and ask, “Which vaccines do I need now, and which should wait?” A few minutes of planning can give mother and baby protection that lasts well beyond the clinic visit.
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