I want to isolate DNA and RNA from faecal and blood samples in order to determine which pathogens (viruses, bacteria, fungi, parasites...) are present in the samples. I currently have one PCR workstation with a HEPA filter. Nevertheless, in order to separate the DNA isolation process from the RNA one, I am planning to buy a new PCR workstation, but the price difference with or without HEPA filter is huge and would compromise the purchase of other necessary equipment. I know it would be great to get the one with HEPA filter, but is it indispensable? Please bear in mind that a UV-lamp would be included in the cabinet no matter which one I choose.

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