Hantavirus sounds scary in the headlines, but understanding how it actually spreads can help you see why most people have little to worry about, and there are some steps you can take to protect yourself if you happen to be in a high-risk exposure group. From what we know so far, the risk for the Read more…
You might have heard of a highly mutated new COVID variant that is making headlines. It’s a variant worth watching, but not worth panicking about — here’s what the science actually says, and what you can do to protect yourself. BLUF (Bottom Line Up Front): “Cicada’, AKA BA.3.2 in science speak, is a variant to Read more…
I’ve heard there was a meningitis outbreak in the UK recently. Can you tell me more and how I can best protect my family? 🤔 Have you heard about the recent meningitis outbreak in the UK? Here’s what you need to know. TL;DR: A recent outbreak of bacterial meningitis in the UK, linked to a Read more…
With measles cases now in 30 states (as of April 2026), many of our readers have questions about what they can do to keep themselves and their loved ones safe. Nerdy Girl Dr. Cindy Leifer (Immuno Minutes) is here to answer them. Read our most recent post on measles by Nerdy Girls Dr. Cindy Leifer Read more…
Measles is a virus that spreads from person to person in tiny droplets that stay in the air for hours. It is the most contagious infection in people. The good news is that there is a highly effective vaccine, which is greater than 97% effective if you get both doses. Watch this video from Cindy Read more…
Jackie from Torrence, CA – What to do when a family member contracts C. Diff? I’ve read that the affected person can shed spores for months to years. How long do I need to bleach everything down? What procedures and products are recommended? C.diff (clostridium difficile) is tough to kill and it can spread in Read more…
If you have been exposed to a measles case, check your vaccination status and watch for symptoms, especially starting around a week later. Measles outbreaks are becoming more common in the U.S. (You can read Those Nerdy Girls’ latest update on measles here.) What should you do if there is a confirmed case near you? Read more…
Measles cases continue to rise – this is worrying. The good news is that there is a super effective vaccine that protects you and your loved ones. Note – we use data from both the Centers for Disease Control and Prevention (CDC) and the Brown University Pandemic Center’s weekly tracking report. While the CDC tracks Read more…
Haemophilus influenzae, also called H. flu, is not the typical yearly flu. H. flu isn’t a virus; it’s a bacteria that can cause a wide variety of illnesses, from a sinus or ear infection to pneumonia and meningitis. There are a few different types of H. flu, but type b is the one we’ll talk Read more…
Neglected tropical diseases (NTDs) are a group of bacterial and parasite related diseases. NTDs are considered “neglected” because they have often been ignored as they tend to impact those living in extreme poverty, where there is little access to safe water and healthcare. NTDs include Chagas disease; dengue and chikungunya; dracunculiasis; echinococcosis; foodborne trematodiases; human Read more…
Hepatitis B (HepB) is an infection of the liver that can lead to chronic disease requiring lifelong treatment and an increased risk of cancer and death. The HepB vaccine has minimal risks and many benefits. Skipping the birth dose leaves infants vulnerable to a lifelong risk of chronic liver disease and cancer. This is why Read more…
TL:DR: The flu season can linger through May, so it’s not too late to get your vaccine. If you already had the flu, the shot can still reduce your risk of catching one of the other strains (the “tri-valent” vaccine covers three). This year’s flu vaccine reduces risk of severe disease, even against the new Read more…
Hepatitis C is a virus spread through infected blood that can hurt the liver over time, but simple screening tests can find it early, and today’s treatments can cure most people. It’s respiratory virus season: that jolly time of year when people get Covid, flu, respiratory syncytial virus, and all the other viruses that cause Read more…
To stop the spread of Norovirus: reach for bleach, wash your hands, don’t share, close the lid, and stay home for two full days if possible. Noroviruses are the most common cause of “stomach bug” outbreaks (vomiting, diarrhea) in older kids and adults. They strike fast and hard, and are very contagious. 2025 UPDATE: With Read more…
Chronic Wasting Disease (CWD) is a deadly illness that affects deer in some rural parts of the U.S. and Canada. There isn’t any strong evidence that CWD infects people, but if you hunt or have contact with deer, there are precautions you can take to keep yourself safe regardless. What is CWD? Chronic Wasting Disease Read more…
Does COVID during pregnancy “cause” neurodevelopmental disorders like autism? A recent study suggests there is a possible link, but more studies are needed to know for sure. There’s been a lot in the news lately about pregnancy and risks of neurodevelopmental disorders, including recent claims that Tylenol/Paracetamol in pregnancy is associated with a higher risk Read more…
Before we dig into where we are now, let’s take a moment to remember and honor those we have lost to HIV/AIDS. This Nerd lost Stuart and Bob, uncle figures and mentors in my childhood and young adulthood. I credit them for my love and passion for public health. Here’s a TL;DR of HIV updates: Read more…
What is cholera, and why is it a big deal? Cholera is a bacteria that can cause really horrible diarrhea that may lead to dehydration and death. Cholera is most commonly transmitted via contaminated water, and sometimes through contaminated food. Though around 75-90% of people can show mild symptoms, 10-25% of people have extreme, watery Read more…
Unfortunately, bird flu is still circulating, and you will likely start hearing more about it as flu season picks up. Let’s recap why we care about bird flu and what we currently know. Note: In the U.S., some of the data updating is delayed due to the ongoing government shutdown and changes within the administration. Read more…
Measles cases in the U.S. and Canada continue to rise, but not as dramatically as they did. Vaccination is still the best way to protect your family and those around you who cannot be vaccinated. (Note – we use data from both the CDC and the Brown University Pandemic Center’s weekly tracking report. While the Read more…
