Gender Danger?

It seems that men are almost twice as likely to die from a Covid-19 infection than are women.  The reasons for this are, however, currently obscure (https://www.theguardian.com/world/2020/mar/26/men-are-much-more-likely-to-die-from-coronavirus-but-why). One of the first suggestions, from the Chinese outbreak, was that it was related to the levels of cigarette smoking (much higher in males than females in that country). But the male death bias persists in other countries where the levels of smoking in men and women are not so different. Another suggestion relates to behavioural differences between the genders, with males being less likely to wash their hands or to seek timely medical help than their female counterparts. More recently, attempts have been made to implicate biological factors such as the impact of sex hormones on the immune system or even an effect of the 'X' chromosome (with men obviously only having one, whereas females have 2). Whatever way you cut it, the dice appear to be stacked against males in this pandemic.