By Ludwig Burger and Natalie Grover (Reuters) – A new COVID-19 wave appears to be brewing in Europe as cooler weather arrives, with public health experts warning that vaccine fatigue and confusion over types of available vaccines will likely limit booster uptake. Omicron subvariants BA.4/5 that dominated this summer are still behind the majority of infections, but newer Omicron subvariants are gaining ground. Hundreds of new forms of Omicron are being tracked by scientists, World Health Organisation (WHO) officials said this week. WHO data released late on Wednesday showed that cases in the Eu…