Accidental exposure to the provider? This may depend somewhat on the regimens that are available to you. In New York, the recommended regimen is now tenofovir/emtricitabine and raltegravir. This regimen can be given to children as well since tenofovir is now approved down to age 2 and I believe that raltegravir is approved down to age 6 with studies ongoing in younger age groups. Dolutegravir will probably replace raltegravir eventually since this can be given once daily along with the others. Before this regimen in children we would use AZT, 3TC and lopinivir/rit. In adults with a known exposure boosted darunavir was used as the PI.

The recommended/standard antiretroviral regimen depend on National guideline for HIV/AIDS in each country

You could also refer to WHO guidelines. Key word: HIV exposure, antiretroviral regimen, WHO