 [ Symptoms ] are there some people at higher risk of having complications from the flu if they do not get vaccinated [ Disease ] there is really little that can be done over the internet other than to offer you some advice i do not know your husband is complete medical history or have any way to medically evaluate his memory issues but he does have some obvious contributory factors tobacco marijuana use poor nutrition a guess insomnia due to unknown factors and perhaps many many other issues he will need to see a medical professional to start the evaluation process assuming you will be able to convince him to do so encouraging him to give up tobacco and marijuana may be futile but at least you can try and work on him