[To his credit, L knows when something is expected of someone in his position, and that it would be nothing short of dishonorable and disrespectful to attempt to shirk his duties.]

It wouldn't be ethical. Provided that you can supply extra, to overcome that single dose immunity, then I'm glad to volunteer.

[A pause, because, really...]

There's been no incident, exactly. Just talk that it could be necessary in the future, and it would be better to have and not need than need and not have.