No it is not.

First: you seem to operate under the impression that a gas cannot leave residue. It does.

https://www.steris-ast.com/techtip/overview-ethylene-oxide-residuals/

Second:

It is not about a one off. It is about the normalcy of being tested everyday. Repeat it long enough and you develop a problem.

See Schools: where kids are being tested daily.

Another point of concern is the spot: being up the Nose as far back as the brain barrier.

A look around at NCBI, we are not the first to raise concerns.

Whether the argument hold that a one off meet with residue could cause brain hemorrhages, brain tumors, lukemia, is debatable, I guess. As said: testing with such swabs is not a one off.

Read the Manual. https://www.lyondellbasell.com/globalassets/documents/chemicals-technical-literature/ethylene-oxide-manual.pdf

Goto page 70. And let it sink in.

No it is not.

First: you seem to operate under the impression that a gas cannot leave residue. It does.

https://www.steris-ast.com/techtip/overview-ethylene-oxide-residuals/

Second:

It is not about a one off. It is about the normalcy of being tested everyday. Repeat it long enough and you develop a problem.

See Schools: where kids are being tested daily.

Another point of concern is the spot: being up the Nose as far back as the brain barrier.

A look around at NCBI, we are not the first to raise concerns.

Whether the argument hold that a one off meet with residue could cause brain hemorrhages, brain tumors, lukemia, is debatable, I guess. As said: testing with such swabs is not a one off.

Read the Manual. https://www.lyondellbasell.com/globalassets/documents/chemicals-technical-literature/ethylene-oxide-manual.pdf