Lol. Čeplak of Slovenia was busted for EPO - *9th* fastest all-time (1:55.19). Graf of Austria was busted for involvement in an Austrian humanplasma blood doping lab - 50th fastest all-time (1:56.64) & Olympic silver medalist.
Russian Mariya Savinova was busted for two (2) ABP hematological-anomalies busts; one at the 2011 WC winning gold and running 24th all-time fastest (1:55.87), and the other at the London Olympics also winning gold. She beat Semenya at both championships. Her Hct levels at both events was about ~11% over her baseline values. There are also two (2) Chinese runners (Liu & Qu) under Ma's army in 93 (suspicion of EPO use) running the 16th & 35th all-time fastest.
What about Jelimo? She runs for Kenya which is a PED-Powered nation with many EPO/ABP busts and a nation listed on the IAAF's "most at risk for doping" list. She could have easily been using EPO. And keep in mind the aerobic/anaerobic energy system contribution for the women's 800 is "70/30%" - so definitely 02-vector doping would be a benefit.
https://pubmed.ncbi.nlm.nih.gov/15966348-energy-system-contribution-to-400-metre-and-800-metre-track-running/