What are the advantages of double purification by RO + UV/UF?

Unlike conventional water purification processes based on a single technology, Acquaclara water purifiers work through double purification by RO and UV/UF. It has the following distinct advantages:

Double purification leaves less scope for impurities to pass through.
Ensures bacteria and viruses are totally killed.
Although RO purification process removes even dissolved impurities, back-up purification by UV and UF processes makes the water 100% Safe all the time.