Statement:
You will be less safe in Yemen than in Vietnam

In the Safest countries rating Yemen holds position #160 ²⁰²² out of 161 and Vietnam is #45 out of 161 ²⁰²².
Position of Yemen is worse than position of Vietnam.
Yemen is an outsider of the "Safest countries" rating. It could be dangerous. So you need to take additional actions and not to be frivolous, compared to Vietnam

Referencies:

1. Safest countries ²⁰²² by GLOBAL PEACE INDEX

   The countries in the rating sorted by 'Score' in ascending order.

   Vietnam	'Score' value is	1.79
   Yemen	'Score' value is	3.39