After 2.8 years our street now has 4 cases of Covid-19. (one to a person shielding due to high risk prior disease) Folk seem to have forgotten it still exists, spreads more easily even if it does not kill as treatment is better. However the Long Covid disability ranges wild, and disables, long term health

An article based on 100 Micron versus 5 micron 60 years ago has had fatal effects today.
20210522 WIRED article on Covid-19 and aerosols, WHO problem ODT.odt


The 60-Year-Old Scientific Screwup That Helped Covid Kill
All pandemic long, scientists brawled over how the virus spreads. Droplets! No, aerosols! At the heart of the fight was a teensy error with huge consequences.

eionmac boosted

If you’re a developer in 2021 and you’re adding tracking devices from Google, Facebook, etc., to your sites and apps, the one thing you can’t do any longer is to feign innocence. You know exactly what you’re doing and you’re complicit in perpetuating surveillance capitalism.



Quantum teleportation is essential for many quantum information technologies, including long-distance quantum networks. Using fiber-coupled devices, including state-of-the-art low-noise superconducting nanowire single-photon detectors and off-the-shelf optics, we achieve conditional quantum teleportation of time-bin qubits at the telecommunication wavelength of 1536.5 nm. We measure teleportation fidelities of ≥90% that are consistent with an analytical model of our system, which includes realistic imperfections. To demonstrate the compatibility of our setup with deployed quantum networks, we teleport qubits over 22 km of single-mode fiber while transmitting qubits over an additional 22 km of fiber. Our systems, which are compatible with emerging solid-state quantum devices, provide a realistic foundation for a high-fidelity quantum Internet with practical devices.

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