Yes, there is such a thing and most people these days are infected by it. It attacks the mind and the heart and renders those afflicted by it impervious to spiritual truth. It is a sickness that doesn't kill the body but harms the soul which, according to Jesus, is a much more serious thing. If untreated, it might damage the soul irreparably. And the reason it has made such inroads is because the human immune system has been ruthlessly compromised by the materialism of the last 2-3 centuries.
Western civilisation which was built on spiritual principles has been subverted by those who hate and fear Christianity. These people have used legitimate advances in understanding to destroy the foundations on which that civilisation stood. They have taken scientific knowledge and turned it against real understanding by cutting it off from its roots as the attempt to know something of God by studying his creation. They have taken the idea of freedom, a great gift through the correct exercise of which we may consciously know and love God, and perverted that to stand for freedom of the fallen self to do as it likes including, or even chiefly, to deny God. God becomes an oppressive limitation on human freedom. They have corrupted the imagination, which was intended to guide us into creative vision, and made of it a means to stimulate desire in its lower aspects. We were intended to expand our horizons but we have only expanded them outwardly not upwardly, and as we have expanded horizontally, we have contracted vertically.
Christianity and other religions, though Christianity most of all, are protections against spiritual disease. There are in the unseen universe the spiritual equivalents of viruses and bacteria. These will attack us and gain entrance to our minds unless there is some sort of defence that can repel them. This defence is religion without which we fall into sin which is spiritual disease. From sin comes alienation and from alienation comes despair.
Look at what has happened to the world over the last couple of months. We are so far removed from any understanding of the higher aspects of life, or let's just say life, that we have scurried into dark corners to hide away from a threat we are told is deadly but which even readily available statistics show to be mild in (currently) 97% of cases. https://www.worldometers.info/coronavirus/. And even the great majority of fatalities are elderly people who are well past their 3 score years and 10. It is not that anyone wishes a person to die before their time, and every precaution should be taken to safeguard the vulnerable at a time like this, but we are sacrificing the long term prospects of the majority for the short term prospects of a few. And we are doing this because governments have allowed themselves to be panicked by the media and the public which, in turn, has happened because we have no faith. The physical virus has affected us mentally as well as physically and it has done so because we have already succumbed to the spiritual virus.
What's the cure? Extending the metaphor, perhaps a bit more than it can take, you could say it's vaccination. Ultimately, it is vaccination by the Holy Spirit but more immediately it is vaccination by faith in Christ, real faith not belief which is a lesser thing often confused with faith. (If you want to know the difference, think of heart and mind.) This will immunise us against fear because it helps us see that the body may fail, one way or another it will fail, but the soul, the spiritual self, when turned towards the flame of eternal life which is Christ will rise up to glory.
Life in this world without belief in something beyond this world always ends in emptiness. This is why so many old people cling to life in any form rather than accept their time to depart. We should not wilfully seek to go before our time. That is rebelling against the will of God which is why suicide is forbidden by the Church. It is also right and proper to try to prolong life through medical help. This is a world out of kilter with spiritual truth and that means there will be sickness for which cures should be sought. But we should know that physical life has its own natural cycle and to try to extend that cycle beyond a certain point is refusing to grow. Worse, it is turning life into death. And that is what the spiritual virus does.