Health

The two doses each use different adenovirus vectors, which limits them to using the specific 2nd dose as a 2nd dose.

Argentina now has 70% of adults with their 1st dose - but only 18% with their second dose, partly as a result of this delay.

(children aren't yet being vaccinated - though that will now change: https://democraticunderground.com/114226087)

They've also diversified their vaccine supply considerably since May, and Sputnik V (which made up over 60% of the supply back then) is now less than 30% of the total.

Neighboring Chile, on the other hand, is still 79% dependent on Sinovac's Coronavac (private Chinese firm) - one of the least affective on the market; Brazil and Uruguay have a similar problem.

You'll notice that when Chile and Uruguay are lauded for their "high vaccination rate" - that caveat usually gets left out.