why they spray you on the airplane on the way to South Africa? and what is that?

Question

spray in the airplane to all the passengers going to South Africa

Answer 1

The spray is an insecticide to kill any errant bugs they may be hitching a ride on you. The spray, a synthetic insecticide called permethrin or d-phenothrin, is based on the same naturally occurring chemical produced by plants to kill predatory bugs

Answer 2

Depending where you are flying from the same thing can happen when flying into Australia. It is to make sure that insects aren't able to fly off the plane and start breeding in that country. Foreign insects can cause enormous problems to native insects and plants and can crush parts of the agricultural economy.

Answer 3

Because you're ugly