I'm 8 months pregnant and just found out

Call your maternity / OB on-call line tonight, before you sleep, and say this: "I'm 8 months pregnant and I was at my sister's house on Friday with a child who has measles. Is Friday still inside the window for protection, and what can you offer me?" Do not wait for Monday, and do not wait to see whether a rash appears — the clock that matters here runs from the day of exposure, and Friday was the day.

Pregnancy is one of the situations recognised as higher risk for measles complications, for you and for the pregnancy. What can be given after an exposure, and whether Friday is still inside the time limit for it, is a clinician's decision and their own protocol — I won't name a product, a dose or a number of hours at home. But the decision belongs to the on-call team tonight, and your question above asks them exactly the right thing.

1. What you already tried, and the better alternative

Waiting to see whether a rash appears. That's the wrong place to put the decision. A rash would be a late signal — by the time it arrived you would have spent the days the post-exposure question runs on. The call is the decision point, not the rash.

You have the thermometer, the vaccination record, the phone. Good kit. Add one thing: before you call, take your temperature and note the time next to it, and dig out *your own* measles vaccination record as well as your child's — an antenatal or clinic card often has it. That record can change the whole answer.

You asked whether you can still be protected while pregnant. Yes, ask the team exactly that. Worth knowing before you dial: pregnancy is a contraindication to live-virus vaccines such as MMR, so that is not the route to ask them about — the question is what non-live option, if any, their service can offer, and how fast.

Around the house tonight: stay away from your sister's house, and keep the child and anyone from that household away from you — measles stays infectious in the air for hours. Keep the room you share with the baby aired, wash hands after the phone and door handles. Normal food from your own kitchen is fine; nothing about your meals protects or harms you here.

2. Constraints and the avoid list

• No leftovers, no online purchases, no powders or mixes. No leftover antibiotics, antivirals, steroids or immune supplements, nothing bought online, nothing anyone offers "just in case". Taking it changes nothing about your protection and only complicates what the team must sort out.
• Don't change anything you're already prescribed, prenatal vitamins included. Nothing you stop or start tonight helps.
• Don't dose anyone else. The child, an elder, a sibling gets nothing from your cupboard.
• Keep pregnant people, babies and anyone with a weak immune system away from the child.
• Don't let "looks fine today" delay the child's own review. A suspected measles picture is a same-day clinician matter even when the child seems well, and saying "suspected measles" out loud is what lets others get protected.
• Don't wait for the public health office to open to tell anyone. The on-call line can pass the exposure on tonight; the office confirms Monday.

3. Decision tree for the next 24 hours

No symptoms, or only a mild temperature → the branch you're in now. Call the on-call line tonight. Temperature morning and evening, with times. Keep yourself away from the exposed house.

If any of these appear — call your local emergency number and say you are 8 months pregnant, or go straight to the maternity unit:

• vaginal bleeding or leaking fluid
• a fever with being too weak to get out of bed
• severe headache with blurred or flashing vision, or sudden puffiness of face or hands
• severe belly pain
• fast or difficult breathing, or chest pain
• a fit, fainting, or collapse
• spots that don't fade when you press a clear glass on them, especially with fever

The child, tonight: hard breathing, drowsiness, or unable to drink is an emergency for them too — call your local emergency number, don't wait for Monday.

After the call, write down who you spoke to, what they said, and by when they want you seen. That note makes Monday easy.

4. What success looks like in 24 hours

Not a cure, and not a promise you won't get sick — just this:

• you've spoken to the on-call team tonight and know whether a post-exposure option applies to you, and by when;
• your own vaccination record is in your hand, photographed;
• no one from the exposed house has been in your home;
• you have a temperature log with times;
• Monday, the public health office hears about the exposure, and the child is seen the same day.

If the line doesn't reach you tonight, push on it — the same number, the maternity unit's own line, or the emergency number for advice — rather than letting Monday become the answer by default.

I don't diagnose, and I don't change or dose anything for you, the baby, the child or anyone else.

Here's a one-page version you can screenshot or take to the phone call: measles-exposure-call-sheet-c83135c2.pdf

One thing I need: which country or city are you in? I don't want to guess a number from your language — if any of those red flags happen, I want to give you the right local one.