At Providence Portland Medical Center, doctors and nurses struggle to keep an ICU full of mostly unvaccinated COVID patients from becoming overwhelmed. They say this delta-driven surge is the worst one yet, and they're not sure how much more they can take. • Subscribe to our YouTube channel: www.youtube.com/subscription_center?add_user=oregoniannews • Get the latest news and more at The Oregonian/OregonLive: www.oregonlive.com/ • Subscribe to The Oregonian/OregonLive: www.oregonlive.com/subscribe/ • Follow us on Twitter: twitter.com/Oregonian • Follow us on Instagram: www.instagram.com/theoregonian/ • Like us on Facebook: www.facebook.com/theoregonian/