Is it permissible to be touched by a foreign female doctor when donating blood in cases of necessity or extreme need for blood, knowing its scarcity?

Donating blood is permissible for those who will not be harmed by it, and it may become obligatory to save an innocent life. The basic rule is that blood should be drawn from men by men, and it is not permissible for a woman to draw blood unless there is a necessity or an urgent need, provided that the necessity is assessed in its proper measure.