Kala Patthar stands at just over 5500m, although not too much time is used at that altitude since the trek then descends back down to Pheriche and inevitably back to Lukla Airport.
whilst no vaccinations are strictly https://bronteavvl136773.wikiannouncing.com/5320417/5_tips_about_everest_base_camp_trek_cost_you_can_use_today