Is it a good idea to buy stocks in companies that make surgical masks etc a few months after this nCov epidemic subsides, in anticipation of making a profit during the next epidemic?

To me it seems no, this is only a short term thing and the companies often produce many very different products not mono (mask),

However LONGTERM investing into diversified Medtech seems successful with particular the ETF ticker IHI having been maybe the most successful (see attached chart versus the already eminently successful SP500)

more here: https://seedly.sg/questions/what-is-your-genera...

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Sounds like what it meant "a good idea", but whether it will turn into fruition is ultimately unknown