I think we need isolation beds, followed by ventilators beds and lastly ICU beds.
I don't have numbers but every one tested positive for covid needs an isolation bed to prevent them from spreading. Most people, ~80%, will recover without needing anything further.
20% of the covid positives will need additional support in terms of ventilator and probably 50-75 % will get well without any further intervention.
The remaining 5-10% of the covid positives will get into serious trouble and will need to get the full ICU treatment.
The % are off the top of my head but assuming them to be true ... and the distribution between ICU, ventilator and isolation to be 5%, 15% and 80%, we can back calculate ...
Assuming 50% ICU allocation for covid, 15K ICU beds will backstop 45K ventilator beds that can backstop 300k isolation beds i.e to say the current system can be scaled up to treat about 3.5 lakhs covid patients at a time.
Further, if everything is diverted to covid treatment, we can probably scale up to 7 lakh covid patients at a time BUT this is the absolute limit. This does not account for bottleneck in other variables like doctors, nurses, technical staff, other staff, consumables, protectives, medicine, etc.
Note, this is an outsiders linear scaling algorithm at work.
Note, as of today ..https://twitter.com/SJha1618/status/1249331511788068864
Saurav Jha @SJha1618
The @MoHFW_INDIA says that 1,05,980 isolation beds located in 601 dedicated hospitals are currently available in India as opposed to the current requirement of only 1671.