1) *RT PCR*
gold std
Highly expensive
Read ORF of proteins and E gene
Result is in 3hrs
2) *CBNAAT*
detect E&N gene in one go
Both for screening and confirmatory
Less expensive than RTPCR
Result is in 2hrs
ICMR adviced for SARI&ICU patients
3) *TRUENAT*
Detect E gene in first level for screening suspected patients
RDRP gene in next level for confirmation
Result is in 1hr
Highly economic with low maintenance cost
ICMR adviced it for screening
4) *Rapid antigen test*
Most economic
ICMR adviced it for containment zones
Result in just 30mts
Moderate sensitivity and high specificity
5) *Antibody tests*
It is meant for seroprevalance survay
IgM starts from 3rd day and present till 22nd day
IgG starts from 7th day and persist till some good length of period
deemagclinic