Adults who will be around a newborn need, at minimum, an up-to-date Tdap (whooping cough) vaccine and a current season’s flu shot. Beyond those two essentials, you should also confirm your immunity to measles, mumps, rubella, and chickenpox, and consider an updated COVID-19 vaccine. Newborns can’t receive most of their own vaccines until they’re two months old, so every vaccinated adult in their orbit acts as a shield during that vulnerable window.
This strategy is called “cocooning,” and it works. A study published in BMC Infectious Diseases found that when both parents were vaccinated against whooping cough before their infant became ill, the risk of infection dropped by roughly 64 to 77 percent. The more people in the baby’s circle who are up to date, the stronger that cocoon becomes.
Tdap: The Most Important One
Whooping cough (pertussis) is the single biggest vaccine-preventable threat to newborns. Babies under six weeks old account for the vast majority of pertussis deaths, and infants can’t start their own vaccine series until two months of age. The gap between birth and that first shot is exactly why adult vaccination matters so much.
The CDC recommends that every adult who has never received a Tdap shot get one, regardless of when they last had a tetanus booster. If you already received Tdap at some point, you still need a tetanus-diphtheria booster (Td or Tdap) every 10 years to maintain protection. If you’re unsure whether you’ve ever had Tdap specifically, getting a dose now is safe and the simplest path forward.
Timing matters. Your body needs about two weeks after vaccination to build full protection, so ideally you’d get the shot at least two weeks before meeting the baby. If the birth is imminent and you haven’t been vaccinated yet, getting it now still helps, but the sooner the better. Pregnant women are advised to get Tdap during the early part of the third trimester of every pregnancy, which passes protective antibodies directly to the baby before birth.
Flu Shot: A Seasonal Must
Influenza is dangerous for newborns, who are too young to be vaccinated against it until six months of age. The CDC recommends that every caregiver and household member aged six months and older get a flu vaccine each year. This includes parents, grandparents, older siblings, babysitters, and anyone who will hold, feed, or spend time near the baby.
Because the flu shot is reformulated annually, last year’s vaccine doesn’t count. You need the current season’s version. If the baby is due during flu season (roughly October through March in the U.S.), make sure everyone in the household is vaccinated before the birth or as soon as the updated vaccine becomes available in the fall.
COVID-19 Vaccine
The CDC recommends an updated 2025-2026 COVID-19 vaccine for everyone aged six months and older, with specific guidance that having a close contact at risk of severe illness is a reason to get vaccinated sooner rather than later. Newborns fall squarely into that category. If you haven’t received an updated dose recently, getting one before spending time around a baby adds another layer of protection during those early weeks when the infant’s immune system is still developing.
MMR and Chickenpox: Confirm Your Immunity
Most adults were vaccinated against measles, mumps, rubella, and chickenpox (varicella) as children, but it’s worth confirming. These diseases can be devastating to newborns, and outbreaks still occur in communities with lower vaccination rates.
For chickenpox, you’re considered immune if you have documentation of two doses of the varicella vaccine, a blood test confirming immunity, were born in the U.S. before 1980, or had a doctor-confirmed case of chickenpox or shingles. If none of those apply, you’ll need vaccination. Adults need two doses of the varicella vaccine, spaced at least 28 days apart.
For measles, mumps, and rubella, adults born in 1957 or later generally need at least one documented dose of the MMR vaccine. If you don’t have records and aren’t sure, a blood test can check your antibody levels, or you can simply get another dose. A single dose of the MMR vaccine produces protective antibodies in about 90 to 95 percent of recipients within 14 days. Since MMR and varicella are live vaccines, they should ideally be given at least four weeks before close contact with the baby to allow full immune response.
RSV: A Different Approach
Unlike the other infections on this list, RSV (respiratory syncytial virus) protection for newborns doesn’t rely on vaccinating the adults around them. Instead, the current approach focuses on the pregnant mother. The CDC recommends a single dose of the maternal RSV vaccine during weeks 32 through 36 of pregnancy, which transfers protective antibodies to the baby before birth. For babies who don’t receive that protection in utero, a preventive antibody injection can be given to the infant directly after birth.
RSV vaccines are also recommended for adults 75 and older, and for those 50 to 74 with risk factors for severe RSV. But these adult doses are designed to protect the adult, not specifically as part of a newborn cocooning strategy.
When to Get Vaccinated Before the Baby Arrives
The ideal timeline is to have all your vaccines sorted out at least two to four weeks before the baby’s due date. Most vaccines take about two weeks to generate a strong immune response, so getting them the day before a hospital visit leaves a gap in protection. Here’s a practical timeline if you know the expected due date:
- Six to eight weeks before: Check your records for Tdap, MMR, and varicella. Schedule any needed shots. This gives enough time for live vaccines (MMR, varicella) to fully take effect and for a second varicella dose if needed.
- Four weeks before: Get your Tdap if you haven’t already, along with a flu shot if it’s flu season.
- Two weeks before: This is your last comfortable window. Vaccines given now should provide protection by the time the baby arrives.
If the baby has already been born and you haven’t been vaccinated, don’t skip it. Get your shots now and take extra precautions in the meantime: wash your hands thoroughly before holding the baby, avoid visiting if you feel even mildly ill, and skip kissing the baby’s face or hands.
Who Counts as “Around the Newborn”
This isn’t just about parents. Anyone who will spend time in close proximity to the baby during the first two months of life should be up to date. That includes grandparents, aunts and uncles, older siblings, regular babysitters, nannies, and close friends who plan to visit. Even a single unvaccinated person who unknowingly carries whooping cough or flu can transmit it to a baby whose immune system has no defenses yet.
If you’re a grandparent or friend planning to visit and the parents ask about your vaccine status, that’s not overprotectiveness. Newborns under three months old who contract severe pertussis face hospitalization rates and outcomes that are genuinely alarming. Being current on your vaccines is one of the most meaningful things you can do for a new baby in your life.