The 2017-2018 flu season is shaping up to be more nasty than recent years. According to the U.S. Centers for Disease Control and Prevention, 13 children have already died from the flu this season. USA Today reports that some states are reporting much higher rates of flu-related hospitalizations than at this point one year ago.

What makes this season more threatening than others? Well, there’s a very specific reason, and it has to do with which particular type of flu strain is dominant this year. You see, the sickness you get from the flu is actually caused by a bunch of different strains of the influenza virus. This flu season, influenza A(H3N2) is the dominant strain, and it’s a biological bully.

Influenza A(H3N2) is the dominant flu strain this flu season, and it's exceptionally yucky.

Historically, flu seasons where influenza A(H3N2) was the dominant strain saw more young people and people 65 years or older being hospitalized or dying when compared to people in the middle of that age range. But it’s not just that A(H3N2) is a stronger viral strain — it’s also harder to vaccinate against.

“[I]nfluenza vaccine effectiveness (VE) in general has been lower against A(H3N2) viruses than against influenza A(H1N1)pdm09 or influenza B viruses,” reads a CDC announcement from the end of December 2017. “Last season, VE against circulating influenza A(H3N2) viruses was estimated to be 32% in the U.S.”

That is not a great success rate for a vaccine, but it’s not necessarily because the vaccines are ineffective. That’s just how the flu vaccine works. The flu mutates so much from year to year that it’s really hard to effectively cover all our viral bases with a single vaccine. Usually, the flu vaccine you get at the doctor or drug store includes deactivated cells from two types of influenza A (H1N1 and H3N2) and influenza B. These cells, in combination with immune system irritating “adjuvants” help prep your immune system to fight off viral infection.

But unfortunately, these vaccines are just our best guess attempt at preempting the impact of flu in what has always been a perpetual viral arms race. For this reason, the CDC is recommending that all doctors who might be treating flu patients — which, to be clear, is all doctors who treat any patients — should also have antiviral medications on-hand.

And even though the success rate of the flu vaccine is relatively low, it’s still a good idea to get it. It will help protect you and your friends, family, and co-workers. It looks like this season, we need every weapon we can get.

When your profession is studying ancient temples and cultural artifacts, you need a toolbox that matches the magnitude of the job. Brushes, buckets, and sieves have long been the foundation of an archaeologist’s work, but today, those essentials are paired with groundbreaking technology to deepen human understanding of our collective past.

As of June, a total of 31 states and the District of Columbia allow for the use of medical marijuana. Pain is the most common reason people say they need this cannabis and the vast majority of users say that it helps. However, despite the claims of the many individuals who believe that cannabinoids — the chemicals in marijuana — can ease pain, it’s been difficult for scientists to explain why. Researchers published in JAMA Psychiatry now claim to clarify the discrepancy.

Like pours of cream spilled into coffee, lunar swirls appear to curl in patchy globs across the surface of the moon. The most famous one is the tadpole-shaped Reiner Gamma. At 40 miles long, it’s caught the eye of astronomers since the Renaissance. Exactly why the moon is replete with these natural features, however, has been a point of academic debate for the last 50 years. Now, scientists from Rutgers University and the University of California, Berkeley say they have an answer.

This summer marks the 30th anniversary of the 1988 Yellowstone fires — massive blazes that affected about 1.2 million acres in and around Yellowstone National Park. Their size and severity surprised scientists, managers, and the public, and received heavy media coverage. Many news reports proclaimed that Yellowstone was destroyed, but nothing was further from the truth.

NASA’s Transiting Exoplanet Survey Satellite, better known as TESS, has one mission: To find exoplanets around the brightest stars near the Earth. In just five months, it’s clear TESS is up to the task. On Tuesday, NASA announced TESS had just identified two potential planets around distant stars and released the first set of images captured by TESS. In the same week, collaborators at the Massachusetts Institute of Technology’s Kavli Institute for Astrophysics and Space Research submitted two papers outlining the evidence for the two planets.