Please supply any evidence that microwave radiation,e.g. from mobile
phones or wifi devices, can be harmful to health, especially in the
case of infants.

The story's told that, years ago, the Russians bugged the American
Embassy in Moscow, using microwave beams, and that all the employees
there at the time finished up with health problems.

The FDA = Federal Drug Administration and the FCC = Federal
Communications Commision and some other agencies have taken a stand at
.05 watts per square centimeter = 50 watts per square meter at times
in the past. 50 watts is about ten times the power of a transmitting
cell phone. Evidence of harm at that level was not compelling and
international pressure has doubled the "safe" amount to 1/10 watt per
square cm. If the cellphone antenna is touching your skin, this amount
of power is typically delivered up to 2 centimeters below the skin
surface, however non-using persons including your baby are rarely
within 2 cm of your cell phone antenna. If you want to be extra safe
keep the cellphone at least 10 cm = 4 inches away from you and the
baby's body. This keeps exposure well below the old standard even for
the skin surface.
 Statistical studies (without careful controls) indicate a moderate
increase in brain tumors amoung long time heavy cell phone users and
others exposed frequently to micro waves of moderate strength. Low
level, infrequent exposure seems to cause no harm. 10,000 watts per
square meter = one watt per square centimeter is know to do damage,
but that is ten times the present "safe" level. The radiation from
cellphones is negligible while they are on standby weiting for a call
= perhaps one millionth of a watt per square centmeter. Sorry this is
from memory, so I have no links.  Neil

Thank you, Neil, for the encouraging comment, which more or less
confirms what I suspected. My son is shortly to become a father for
the first time and was concerned by this aspect of living in an
increasingly "wireless* society.
I may be wrong in the other conclusion I have drawn, which is that the
absence of an official answer is an indication that the evidence I
asked for must be pretty thin on the ground