Table 2. Various biosensors for detection of A (H1N1) virus.

S.N.o	Sensor type	Gene/protein	Sensitivity/L.O.D	Sample type	Detection time	References
1	AuNP immunosensor	HA, NA antibody	50.5 pg/ml	H1N1 virus	–	[54]
2	Fluorescent immunosensor	HA/fusion antibody	Not reported	H1N1 Virus	–	[73]
3	Surface plasmon resonance	HA	4.5 pmol l-1	H1N1 Virus	–	[74]
4	Immunosensor /SPR	HA /antibody	30 PFU/ml	labelled anti-HA	20 min	[75]
5	Immunosensor	M1/polyclonal antibody	80–100 virions/µl	H1N1 virus	30 min	[79]
6	PEDOT with galatcose	HA binding	0.12, 0.013 HAU	H1N1 virus	–	[80]
7	BDD	M1 antibody	1 fg/ml	antibody-M1	5 min	[83]
8	SiO2-IO	HA antibody	103–105 PFU	H1N1 virus	–	[84]
9	SWCNT immunoassay	anti- HIN1	180 TCID50ml	H1N1 Virus	–	[88]
10	Impedance aptasensor	DNA aptamer	0.9 pg/µl	H1N1 virus	–	[89]
11	DPM-coated gold electrode	His6-H1 HA	1 × 109 to 1 × 108 fold	HA antibody in sera	–	[90]
12	QCM immunosensor	Anti-MA	1 × 103 pfu/ml	H1N1 virus	>100 min	[95]
13	FET Biosensor	HA binding	6000 HA mol/20 µl	HA protein	–	[112]

Notes: HAU, hemagglutinin unit; TCID, tissue culture infective dose; PFU, plaque forming unit; PEDOT, Poly (3,4-ethylenedioxythiophene); DPM, dipyrromethene; BDD, Boron doped diamond; HA, hemagglutinin; MA. Matrix.