Once I stopped my bike under a High Voltage Transmission Line, it was a wet soil. and I felt a strong "buzz" of the induced AC voltage in the bike body when i touched it and my foot on the ground.

The scientific question would be to first ask whether there is any measurable effect on biological systems, and if so whether that effect was beneficial or detrimental. Your question psychologically pre-loads the assumption that the effect is measurable and detrimental.

The only scientific (not anecdotal) evidence I have found indicates that a high electric field strength can enhances plant growth and seed germination; so if the field is strong enough it would appear to be beneficial to life.

Please note that these effects were only measurable at a field strength of 2.5kV/m.

This is 126 times bigger than the field strength you measured.

Ref:

Iwata, S.; Okumura, T.; Muramoto, Y.; Shimizu, N., "Influence of A.C. electric field on plant growth," Electrical Insulation and Dielectric Phenomena (CEIDP), 2011 Annual Report Conference on , vol., no., pp.179,182, 16-19 Oct. 2011

doi: 10.1109/CEIDP.2011.6232626

keywords: {bioelectric potentials;botany;A.C. electric field;D.C. field;frequency 60 Hz;plant growth;seed germination;stem growth;thale cress;time 4 day;time 8 day;Acceleration;Cotton;Electric fields;Humidity;Length measurement;Polymers},

URL: http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=6232626&isnumber=6232585

Its still matter of research that electromagnetic Hypersensitivity do exist physically:

http://en.wikipedia.org/wiki/Electromagnetic_hypersensitivity

In my opinion, the measurement results are not true - You used high frequency EMF probe to measure 50Hz..... What type of probe You used?

My experiences in EMF metrology show, that some HF meteres a sensitive for ELF fields - not only probe, but together: meter body and probe.

more yuo can find in "Electromagnetic Measurements in the Near Field (Scitech Series on Electromagnetic Compatibility)

Pawel Bienkowski, Hubert Trzaska ISBN : 1891121065 / ISBN 9781891121067

You can consult the ICNIRP guidelines on low frequency electric and magnetic fields: 'LF Guidelines' and 'LF Fact sheet'. Available from: http://www.icnirp.de/PubMost.htm

With respect to ICNIRP guidelines, the reference value of e-field is 10 kV/m. The measured value of 19.8 v/m is very less. Hence the effect due to e-field are negligible.