Why we still don’t know exactly how bird flu is spreading between cows

Early evidence suggests that a bird flu virus called H5N1 may be infecting dairy cows through contaminated milking equipment – but poor surveillance has made it nearly impossible to rule out other possibilities  New Scientist – Health

​Early evidence suggests that a bird flu virus called H5N1 may be infecting dairy cows through contaminated milking equipment – but poor surveillance has made it nearly impossible to rule out other possibilities