I was recently joke prodded with the idea that I should wear my tin foil hat…….I guess this is because of my theories that HI viruses are not too heavy for flying needles on mosquitoes to carry and how I believe that there cannot be such a thing as HIV is described with out them being transmitted by flying needles.

(maybe these would be called CIV for “Culicidae Immunodeficiency Virus” as carriers would be infected as well as being transmitters)

In response, I told that human that tin foil is not readily available anymore.

It was replaced with aluminum decades ago.

Why do people not study these things!

As per Wikipedia:

Scientific basis

The notion that a metal foil hat can significantly reduce the intensity of incident radio frequency radiation on the wearer’s brain has some scientific validity, as the effect of strong radio waves has been documented for quite some time.[6] A well-constructed aluminum foil enclosure would approximate a Faraday cage, reducing the amount of radiofrequency electromagnetic radiation passing through to the interior of the structure. A common high school physics demonstration involves placing an AM radio on aluminum foil, and then covering the radio with a metal bucket. This leads to a noticeable reduction in signal strength. The efficiency of such an enclosure in blocking electromagnetic radiation depends on the thickness of the foil, as dictated by the “skin depth” of the conductor for a particular wave frequency range of the radiation. For half-millimetre-thick aluminum foil, radiation above about 20 kHz (i.e., including both AM and FM bands) would be partially blocked, although aluminum foil is not sold in this thickness, so numerous layers of foil would be required to achieve this effect.[7]

Feature image of aluminum foil hat that blocks radio waves to a degree is an image of a man wearing a TFH though it really should be referred to as an AFH is in the public domain as released by Drvec (talk)

Other image of radio transmitter created by Heinrich Hertz is in the public domain (source: Downloaded September 12, 2013 from Raymond Francis Yates, Louis Gerard Pacent (1922) The Complete Radio Book, The Century Co., New York, p. 32 on Google Books). Radio transmitters send particles of electrons and protons in the air that are as big as viruses (well not really – light quanta is what radio waves really are) but you get the idea – transmitters!