Guest
As per our long standing policy of not permitting medical advice on the forum - all threads concerning the Coronavirus will be locked.
For more info on the coronavirus please see the link below:
https://www.cdc.gov/coronavirus/2019-nCoV/summary.html
The standard and metric thread pitches used on modern 3 piece razors are close enough that they are interchangeable. The older Gillettes (eg - Tech) are not, however.