A recently published study by Anahi Cardona and Manuel Montoya of the Universidad Nacional de San Antonio Abad del Cusco (UNSAAC) concludes that there is a statistically significant difference in Covid-19 mortality rates at high elevations.
Here in Cusco there have been 3 fatalities attributed to Covid-19 to date but there is growing concern that the underlying infection rate is set to increase. Time will tell.
Stay safe.