No vaccine is 100% effective. Though so-called "breakthrough" COVID cases are rare, the virus is circulating widely. What's a vaccinated person to do? And ... not do?

We ponder your pandemic questions. This week's topics: vaccine cards (including whether to laminate or not), group singing sessions and CBD products.

Airports are getting busier, but the CDC hasn't issued new guidelines for vaccinated folks. What's a wannabe traveler to do? And is it OK to get a vaccine if you just got tattooed? Or have no spleen?

People who've had dose 1 are wondering ... can I have a few drinks before dose 2 or will that muck things up? Also: Do you really understand the concept of "vaccine efficacy"? It's complicated!

The term "hair loss" has been googled a lot during this pandemic. What's going on?

Double masking earns praise as a way to keep safe from more contagious variants. Are there other mask hacks? And vaccines are prompting some queries.

Are there issues with having a mammogram right after a vaccine? Is there a list of vaccine ingredients — some people say they're scary. Also: My pooch loves to sniff discarded masks. Should I worry?

Readers are asking about vaccine protocols, the safest way to take off a mask, whether it's risky to engage in therapeutic cuddling sessions with goats.

There are those among us who are needle-phobic. So what's the verdict on the vaccine? And are there any techniques for easing any potential pain?

Our correspondent took a flight Sunday and saw a number of concerning things in airports and on planes. So many questions were raised. We went in search of answers.

The newly detected strain — dubbed B.1.1.7 — appears to be more contagious. What precautions might be effective in trying to keep from getting infected?

Readers want to know the best way to maintain a reusable mask? There are a few options. But spoiler alert ... keep it out of the oven!

Do portable air cleaning machines really help reduce the risk of COVID-19 transmission in the home? The frustrating short answer: "It depends." Find out what it depends upon.

Despite laws guaranteeing access to health care, non-English speakers in the U.S. often rely on family and friends as ad hoc interpreters — and may misunderstand what doctors think they're conveying.