Top 10 tips everyone should know about wearing #N95 & #elastomeric masks.
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THREAD!
Tip #1: Masks buy time. Context matters too: Ventilation (HVAC/outdoor air), filtration (HEPA), & ⬇️ people buy more time.
The longer you’ll be someplace or the worse the context, the better the mask you’ll need.
In a “typical” setting, you might expect this (per @akm5376):
Tip #2: If you’re going to be someplace a long time (home, office, hospital, wedding), open windows, add #HEPA, turn HVAC from ‘auto’ to ‘on' & do testing.
BOOM, you just improved your mask. Better context = less work for the mask.
Tip #3: These are my three fav N95s. The Aegle & 3M Aura are good for most adult size faces. The Vflex is good for larger faces. I think 80-90% would be happy with the Aura.
Buy a nebulizer & sweet (called FT-31) or bitter (FT-32) fit testing solution. The nebulizer vaporizes the solution. If you can taste it, your mask has gaps.
Tip #8: Always buy directly from the manufacturer, a nonprofit like @projectn95, or a verified sourced. For example, Amazon sells a ton of fakes, but GVS is verified to sell authentically via Amazon. Do your homework.
FYI, I have no COIs, including no investment in any company listed. I’m a multidisciplinary scientist. My goal is to pass along advice from experts in a way that’s more relatable to communities.
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🔹2.2 million weekly infections
🔹1 in 149 actively infectious
🔹>100,000 LC cases resulting from the week's infections
🔹>800 deaths resulting from the week's infections
🔹"Lull" transmission steady/slightly declining
🧵2/5 | PMC Dashboard, Apr1il 14, 2025 (U.S.)
Year-over-year transmission (red line, lower left) is tracking the median (grey), year 4 (yellow), and year 5 (orange) closely.
If that trend continues, expect steady yet bumpy transmission the next couple months, until June/July.
🧵3/5 | PMC Dashboard, Apr1il 14, 2025 (U.S.)
The heat map shows only 4 states in the CDC 'high' level and none in the 'very' high level.
Check local data. Those timing activities to lulls may see a clear opportunity.
The NIH Clinical Center drops universal masking after 5 months of protecting patients, family, & staff.
Wastewater-derived estimates indicate 2.79 million Americans are getting Covid per week AND top actuaries suggest an American dies of Covid every 3 minutes.
🔹1 in 120 actively infectious
🔹1 in 3 chance of exposure in a room of 50
🔹2.8 million weekly infections
🔹>140,000 resulting LC cases from the week's infections
🔹>1,000 deaths resulting from the week's infections
2) Watch this video to understand how we use excess death data from one of the world's largest reinsurers to estimate how this week's infections will result in >1,000 deaths.
🔹800-1,400 deaths expected to result from this week's infections (new stat, see video next Tweet)
🔹100,000+ Long Covid conditions to result from this week's infections
🔹1 in 142 actively infectious today
🧵2 of 5
PMC Dashboard, March 31, 2025 (U.S.)
This video explains U.S. COVID excess death statistics, which we have incorporated into the dashboard.
🔥109,000-175,000 people in the U.S. are expected to die as a result of COVID in 2025, based on estimates derived from Swiss Re
🔥COVID deaths expected to be on par with lung cancer in the U.S. in 2025
🔥Death data added to the dashboard
2) Full video links to learn more about COVID #ExcessDeaths in the U.S.
🔹3 million new weekly infections in a persistent "lull" of substantial transmission
🔹1 in 107 (0.9%) of the population actively infectious
🔹1 in 3 regions in high/very high transmission (16 states and DC)
PMC Dashboard, Mar 24, 2025 (U.S.)
🧵2/5
We have had a steady state of about a half million infections the past several weeks. That's over 50 million estimated infections so far in 2025.
In a room of 40-50 people, there's a 1-in-3 chance of exposure if no testing/isolation.
PMC Dashboard, Mar 24, 2025 (U.S.)
🧵3/5
There's a good chance of steady transmission the next month. Often, we'd head into a low lull about now. BUT there are no universal precautions, immunity is waning from the fall & winter 2023-24, & viral evolution looks less 'lucky.'