Move over, COVID and Flu! We have “hybrid viruses” to contend with now

COVID and influenza viruses can be serious, of course, so let’s be clear up front that we’re not being dismissive of those. But, most people are hearing a lot about them, whereas respiratory syncytial virus (RSV) has flown under a lot of radars.

Simply put, until recently it hasn’t been considered much of a threat except to the young, the old, or people with other respiratory illnesses. Only these days, the prevalence of “other respiratory illnesses” is a lot higher than it used to be!

It’s not just a comorbidity

It’s easy to think “well of course if you have more than one illness at once, especially similar ones, that’s going to suck” but it’s a bit more than that; it produces newer, more interesting, hybrid viruses. Here’s a research paper from last year’s “flu season”:

Coinfection by influenza A virus and respiratory syncytial virus produces hybrid virus particles

Best to be aware of this if you’re in the “older” age-range

It’s not just that the older we are, the more likely we are to get it. Critically, the older we are, the more likely we are to be hospitalized by it.

And..the older we are, the less likely we are to come back from hospital if hospitalized by it.

Some years back, the intensive care and mortality rates for people over the age of 65 were 8% and 7%, respectively:

Respiratory syncytial virus infection in elderly and high-risk adults

…but a new study this year has found the rates like to be 2.2x that, i.e. 15% intensive care rate and 18% mortality, respectively:

Adjusting for Case Under-Ascertainment in Estimating RSV Hospitalisation Burden of Older Adults in High-Income Countries: a Systematic Review and Modelling Study

Want to know more?

Here are some hot-off-the-press news articles on the topic:

• Better awareness of RSV in older adults is needed to reduce hospitalizations
• Is there also a connection between RSV and asthma?
• Respiratory syncytial virus coinfections conspire to worsen disease

And as for what to do…

Same general advice as for COVID and Flu, just, ever-more important:

• Try to keep to well-ventilated places as much as possible
• Get any worrying symptoms checked out quickly
• Mask up when appropriate
• Get your shots as appropriate

See also:

Harvard Health Review | Fall shots: Who’s most vulnerable to RSV, COVID, and the flu, and which shots are the right choice for you to help protect against serious illness and hospitalization?

Stay safe!

What are nootropics, really?

A nootropic is anything that functions as a cognitive enhancer—in other words, improves our brainpower.

These can be sensationalized as “smart drugs”, misrepresented excitingly in science fiction, meme-ified in the mundane (“but first, coffee”), and reframed entirely, (“exercise is the best nootropic”).

So, clearly, “nootropics” can mean a lot of different things. Let’s look at some of the main categories…

The neurochemical modulators

These are what often get called “smart drugs”. They are literally drugs (have a chemical effect on the body that isn’t found in our diet), and they affect the levels of certain neurotransmitters in the brain, such as by:

• Adding more of that neurotransmitter (simple enough)
• Decreasing the rate at which we lose that neurotransmitter (re-uptake inhibitors)
• Antagonizing an unhelpful neurotransmitter (doing the opposite thing to it)
• Blocking an unhelpful neurotransmitter (stopping the receptors from receiving it)

“Unhelpful” here is relative and subjective, of course. We need all the neurotransmitters that are in our brain, after all, we just don’t need all of them all the time.

Examples: modafinil, a dopamine re-uptake inhibitor (mostly prescribed for sleep disorders), reduces the rate at which our brains scrub dopamine, resulting in a gradual build-up of dopamine that we naturally produced, so we get to enjoy that dopamine for longer. This will tend to promote wakefulness, and may also help with problem-solving and language faculties—as well as giving a mood boost. In other words, all things that dopamine is used for. Mirtazaрine, an adrenoreceptor agonist (mostly prescribed as an antidepressant), increases noradrenergic neurotransmission, thus giving many other brain functions a boost.

Why it works: our brains need healthy levels of neurotransmitters, in order to function well. Those levels are normally self-regulating, but can become depleted in times of stress or fatigue, for example.

The metabolic brain boosters

These are the kind of things that get included in nootropic stacks (stack = a collection of supplements and/or drugs that complement each other and are taken together—for example, a multivitamin tablet could be described as a vitamin stack) even though they have nothing specifically relating them to brain function. Why are they included?

The brain needs so much fuel. Metabolically speaking, it’s a gas-guzzler. It’s the single most resource-intensive organ of our body, by far. So, metabolic brain boosters tend to:

• Increase blood flow
• Increase blood oxygenation
• Increase blood general health
• Improve blood pressure (this is relative and subjective, since very obviously there’s a sweet spot)

Examples: B-vitamins. Yep, it can be that simple. A less obvious example might be Co-enzyme Q10, which supports energy production on a cellular level, and good cardiovascular health.

Why it works: you can’t have a healthy brain without a healthy heart!

We are such stuff as brains are made of

Our brains are made of mostly fat, water, and protein. But, not just any old fat and protein—we’re at least a little bit special! So, brain-food foods tend to:

• Give the brain the fats and proteins it’s made of
• Give the brain the stuff to make the fats and proteins it’s made of (simpler fats, and amino acids)
• Give the brain hydration! Just having water, and electrolytes as appropriate, does this

Examples: healthy fats from nuts, seeds, and seafood; also, a lot of phytonutrients from greens and certain fruits. Long-time subscribers may remember our article “Brain Food: The Eyes Have It!” on the importance of dietary lutein in reducing Alzheimer’s risk, for example

Why it works: this is matter of structural upkeep and maintenance—our brains don’t work fabulously if deprived of the very stuff they’re made of! Especially hydration is seriously underrated as a nootropic factor, by the way. Most people are dehydrated most of the time, and the brain dehydrates quickly. Fortunately, it rehydrates quickly as well when we take hydrating liquids.

Weird things that sound like ingredients in a witch’s potion

These are too numerous and too varied in how they work to cover here, but they do appear a lot in nootropic stacks and in popular literature on the subject.

Often they work by one of the mechanisms described above; sometimes we’re not entirely sure how they work, and have only measured their effects sufficiently to know that, somehow, they do work.

Examples: panax ginseng is one of the best-studied examples that still remains quite mysterious in many aspects of its mechanism. Lion’s Mane (the mushroom, not the jellyfish or the big cat hairstyle), meanwhile, is known to contain specific compounds that stimulate healthy brain cell growth.

Why it works: as we say, it varies so much from on ingredient to another in this category, so… Watch out for our Research Review Monday features, as we’ll be covering some of these in the coming weeks!

(PS, if there’s any you’d like us to focus on, let us know! We always love to hear from you. You can hit reply to any of our emails, or use the handy feedback widget at the bottom)